<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:147bda9d-2410-4add-86f1-2b1ac6296e73,g:f2a04ab2-4691-42d2-b0dc-19fdcfaa20be-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.proassurance.com/role/CondensedConsolidatedStatementsofChangesinCapitalUnaudited" xlink:type="simple" xlink:href="pra-20240930.xsd#CondensedConsolidatedStatementsofChangesinCapitalUnaudited"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/CondensedConsolidatedStatementsofChangesinCapitalUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_36cc8ceb-31b5-4b56-ab55-92bfd5798eb0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_facdb50f-4b3a-44e8-89e3-51541bc552ea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_36cc8ceb-31b5-4b56-ab55-92bfd5798eb0" xlink:to="loc_us-gaap_StatementTable_facdb50f-4b3a-44e8-89e3-51541bc552ea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3409c115-183b-4cff-a841-d450eb4e3833" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_facdb50f-4b3a-44e8-89e3-51541bc552ea" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3409c115-183b-4cff-a841-d450eb4e3833" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3409c115-183b-4cff-a841-d450eb4e3833_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3409c115-183b-4cff-a841-d450eb4e3833" xlink:to="loc_us-gaap_EquityComponentDomain_3409c115-183b-4cff-a841-d450eb4e3833_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3409c115-183b-4cff-a841-d450eb4e3833" xlink:to="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_29e0fe41-0896-434a-bcc1-ce66c93dbf5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:to="loc_us-gaap_CommonStockMember_29e0fe41-0896-434a-bcc1-ce66c93dbf5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_c7be8e83-0675-4a81-88ae-e6e4c3225b37" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_c7be8e83-0675-4a81-88ae-e6e4c3225b37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_6f378e2e-f4e7-44ca-a853-89ab18b4a458" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_6f378e2e-f4e7-44ca-a853-89ab18b4a458" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_c0d82193-7d3e-4b1d-be40-a2dd8600d45c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:to="loc_us-gaap_RetainedEarningsMember_c0d82193-7d3e-4b1d-be40-a2dd8600d45c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_bc2f54c7-15ae-4163-8492-fb7196fcb7af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_978582a0-df62-4ba9-b12c-bbc16cd486a0" xlink:to="loc_us-gaap_TreasuryStockCommonMember_bc2f54c7-15ae-4163-8492-fb7196fcb7af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_36cc8ceb-31b5-4b56-ab55-92bfd5798eb0" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_d95f8c89-03a0-41d6-980a-a1ff6c2c4e06" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_StockholdersEquity_d95f8c89-03a0-41d6-980a-a1ff6c2c4e06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_ea45d982-e286-4770-8656-0f11e7f99753" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_ea45d982-e286-4770-8656-0f11e7f99753" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueOther_66ffc4fc-b4cb-4065-b0e1-0d86eb017d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueOther_66ffc4fc-b4cb-4065-b0e1-0d86eb017d7e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_bf01dc44-a3bb-4e82-b9b8-2190a992b4fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_bf01dc44-a3bb-4e82-b9b8-2190a992b4fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_13f7c6ce-9902-4b35-baf5-5a8ce49a2fa0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_13f7c6ce-9902-4b35-baf5-5a8ce49a2fa0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_16ab8d2d-cdae-42df-81d4-81712fb40432" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_DividendsCommonStock_16ab8d2d-cdae-42df-81d4-81712fb40432" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_bb13fe8e-49b1-4667-b37e-6e4eb1a28a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_bb13fe8e-49b1-4667-b37e-6e4eb1a28a3a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_8d82b27f-4ecf-430b-8218-3e1b797382a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cbe5ecac-6ada-405e-b269-e3b5566e9a4b" xlink:to="loc_us-gaap_NetIncomeLoss_8d82b27f-4ecf-430b-8218-3e1b797382a5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_49aef709-3e72-4d74-ae03-1a49c4680554" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/FairValueMeasurementAssetsandLiabilitiesMeasuredatFairValueDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#FairValueMeasurementAssetsandLiabilitiesMeasuredatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/FairValueMeasurementAssetsandLiabilitiesMeasuredatFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5af45c27-1ebf-4e26-8ed1-86d54bfb7e8c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d3356909-acd4-4a97-b128-de6abf36a609" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5af45c27-1ebf-4e26-8ed1-86d54bfb7e8c" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d3356909-acd4-4a97-b128-de6abf36a609" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_45f16e8c-3f57-496c-b5af-deb5821953ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d3356909-acd4-4a97-b128-de6abf36a609" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_45f16e8c-3f57-496c-b5af-deb5821953ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_45f16e8c-3f57-496c-b5af-deb5821953ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_45f16e8c-3f57-496c-b5af-deb5821953ab" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_45f16e8c-3f57-496c-b5af-deb5821953ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_80620a26-8fdf-4708-9e9b-62bfbc4ac230" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_45f16e8c-3f57-496c-b5af-deb5821953ab" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_80620a26-8fdf-4708-9e9b-62bfbc4ac230" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_a545e096-2aee-4596-91b5-e251797391fa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_80620a26-8fdf-4708-9e9b-62bfbc4ac230" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_a545e096-2aee-4596-91b5-e251797391fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_12d7a044-b717-4f62-987e-d23606faa94a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d3356909-acd4-4a97-b128-de6abf36a609" xlink:to="loc_us-gaap_FinancialInstrumentAxis_12d7a044-b717-4f62-987e-d23606faa94a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12d7a044-b717-4f62-987e-d23606faa94a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_12d7a044-b717-4f62-987e-d23606faa94a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_12d7a044-b717-4f62-987e-d23606faa94a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_12d7a044-b717-4f62-987e-d23606faa94a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_fa02a6c4-c024-4b59-b54f-2409c3e1c7b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_fa02a6c4-c024-4b59-b54f-2409c3e1c7b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_a2ceb15a-650d-4d6a-b0fe-5e8d93b71058" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_a2ceb15a-650d-4d6a-b0fe-5e8d93b71058" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_15f67866-e313-44e2-ba94-0ca53f7db35e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_15f67866-e313-44e2-ba94-0ca53f7db35e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_CorporateBondsMultipleObservableInputsMember_c19e074a-b17d-4167-8951-440361a93601" xlink:href="pra-20240930.xsd#pra_CorporateBondsMultipleObservableInputsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_pra_CorporateBondsMultipleObservableInputsMember_c19e074a-b17d-4167-8951-440361a93601" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_CorporateDebtLimitedObservableInputsMember_7520277a-9c80-4050-ac5b-b3892280de59" xlink:href="pra-20240930.xsd#pra_CorporateDebtLimitedObservableInputsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_pra_CorporateDebtLimitedObservableInputsMember_7520277a-9c80-4050-ac5b-b3892280de59" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_5d6bbb6f-f770-4737-8627-fe355b012926" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_5d6bbb6f-f770-4737-8627-fe355b012926" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_2891baa9-ab60-4a5b-b64e-d5719d530ddc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_2891baa9-ab60-4a5b-b64e-d5719d530ddc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_6dd8ad5b-0d0a-486a-81cb-39701d14b02a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_6dd8ad5b-0d0a-486a-81cb-39701d14b02a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_927f3cf5-2384-4773-ae6c-d2f625568fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_927f3cf5-2384-4773-ae6c-d2f625568fd3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_EquityFinancialSecuritiesMember_5f830001-d71d-442c-8063-44604a376f07" xlink:href="pra-20240930.xsd#pra_EquityFinancialSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_pra_EquityFinancialSecuritiesMember_5f830001-d71d-442c-8063-44604a376f07" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_UtilitiesEnergyEquitySecuritiesMember_1108db0e-4ab6-4c9d-b1e4-e4fd79b9dfdc" xlink:href="pra-20240930.xsd#pra_UtilitiesEnergyEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_pra_UtilitiesEnergyEquitySecuritiesMember_1108db0e-4ab6-4c9d-b1e4-e4fd79b9dfdc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_EquityIndustrialSecuritiesMember_6202954a-74a5-4792-9acd-7e28347ccc59" xlink:href="pra-20240930.xsd#pra_EquityIndustrialSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_pra_EquityIndustrialSecuritiesMember_6202954a-74a5-4792-9acd-7e28347ccc59" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeFundsMember_8f4e565f-1071-4b85-a73e-c8992bb5d6a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FixedIncomeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_FixedIncomeFundsMember_8f4e565f-1071-4b85-a73e-c8992bb5d6a6" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_AllOtherMember_dc9cafaf-a677-49be-9d79-d49d62015989" xlink:href="pra-20240930.xsd#pra_AllOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_pra_AllOtherMember_dc9cafaf-a677-49be-9d79-d49d62015989" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_e64cddf3-df37-43cb-bbd4-8a9d7d0cbef0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShortTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_e64cddf3-df37-43cb-bbd4-8a9d7d0cbef0" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestmentsMember_5b872425-1173-41cc-910b-58f1e42b7450" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_OtherInvestmentsMember_5b872425-1173-41cc-910b-58f1e42b7450" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_3e41c6ba-0f3d-4433-8b2d-46903273715c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a6851-fe3e-4435-ab6f-dcdfe49cb748" xlink:to="loc_us-gaap_EquitySecuritiesMember_3e41c6ba-0f3d-4433-8b2d-46903273715c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1541ccdf-6a39-46dd-8f8c-f2cbb543ed8e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d3356909-acd4-4a97-b128-de6abf36a609" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1541ccdf-6a39-46dd-8f8c-f2cbb543ed8e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1541ccdf-6a39-46dd-8f8c-f2cbb543ed8e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1541ccdf-6a39-46dd-8f8c-f2cbb543ed8e" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1541ccdf-6a39-46dd-8f8c-f2cbb543ed8e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f3c89c47-50c7-4317-84bf-6c4821cff903" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1541ccdf-6a39-46dd-8f8c-f2cbb543ed8e" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f3c89c47-50c7-4317-84bf-6c4821cff903" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member_92c195e5-f5a3-4b70-8861-561bc6f18578" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f3c89c47-50c7-4317-84bf-6c4821cff903" xlink:to="loc_us-gaap_FairValueInputsLevel12And3Member_92c195e5-f5a3-4b70-8861-561bc6f18578" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_95691993-329c-4f88-8142-5540a311340d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_92c195e5-f5a3-4b70-8861-561bc6f18578" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_95691993-329c-4f88-8142-5540a311340d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_d108896d-e3cf-4202-9f65-f46b47c91ae2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_92c195e5-f5a3-4b70-8861-561bc6f18578" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_d108896d-e3cf-4202-9f65-f46b47c91ae2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_70dd3701-c09f-40ee-a6dd-542d4581f7cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_92c195e5-f5a3-4b70-8861-561bc6f18578" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_70dd3701-c09f-40ee-a6dd-542d4581f7cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_dcb2e4a8-35aa-410e-98ac-4c19b4dbd7f8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f3c89c47-50c7-4317-84bf-6c4821cff903" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_dcb2e4a8-35aa-410e-98ac-4c19b4dbd7f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_f16da22c-0097-486a-9221-c79b9c60d9dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d3356909-acd4-4a97-b128-de6abf36a609" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_f16da22c-0097-486a-9221-c79b9c60d9dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_f16da22c-0097-486a-9221-c79b9c60d9dc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_f16da22c-0097-486a-9221-c79b9c60d9dc" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_f16da22c-0097-486a-9221-c79b9c60d9dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_2d66c5b2-a1d6-4ec3-8bb1-92e88e6fb272" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_f16da22c-0097-486a-9221-c79b9c60d9dc" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_2d66c5b2-a1d6-4ec3-8bb1-92e88e6fb272" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentsInUnconsolidatedSubsidiariesMember_8039d36d-a905-4876-8745-30d7a78ee10a" xlink:href="pra-20240930.xsd#pra_InvestmentsInUnconsolidatedSubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2d66c5b2-a1d6-4ec3-8bb1-92e88e6fb272" xlink:to="loc_pra_InvestmentsInUnconsolidatedSubsidiariesMember_8039d36d-a905-4876-8745-30d7a78ee10a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5af45c27-1ebf-4e26-8ed1-86d54bfb7e8c" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_4dcaeeac-b1e3-4320-b938-394005a47370" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_4dcaeeac-b1e3-4320-b938-394005a47370" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_9e06ab25-106e-4f72-aa09-7d499fa999db" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:to="loc_us-gaap_TradingSecuritiesDebt_9e06ab25-106e-4f72-aa09-7d499fa999db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_960b8224-a663-4939-ad0b-df5a1d211f71" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_960b8224-a663-4939-ad0b-df5a1d211f71" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_920990f4-32bd-4413-9c6c-a67bb7b1d132" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_920990f4-32bd-4413-9c6c-a67bb7b1d132" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_437df1e9-06bf-415a-b3c3-9184a854b645" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_437df1e9-06bf-415a-b3c3-9184a854b645" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_ab62b0a1-e002-4121-aa3c-8f4b6af6da0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_af7ccc1c-2c74-492d-8356-3ff1a8df5dda" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_ab62b0a1-e002-4121-aa3c-8f4b6af6da0d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_7c533dff-92d2-40b6-b126-7d280b05252a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5af45c27-1ebf-4e26-8ed1-86d54bfb7e8c" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_7c533dff-92d2-40b6-b126-7d280b05252a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_7de19c6d-46e7-4dfa-9e8b-ab6bba3c9de4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_7c533dff-92d2-40b6-b126-7d280b05252a" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_7de19c6d-46e7-4dfa-9e8b-ab6bba3c9de4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_9af0ee62-edd2-417f-8c33-454687f2ade0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_7c533dff-92d2-40b6-b126-7d280b05252a" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_9af0ee62-edd2-417f-8c33-454687f2ade0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/FairValueMeasurementQuantitativeInformationRegardingLevel3ValuationsDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#FairValueMeasurementQuantitativeInformationRegardingLevel3ValuationsDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/FairValueMeasurementQuantitativeInformationRegardingLevel3ValuationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_31073495-acf8-43bc-b9a9-c64afd7be96b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_31073495-acf8-43bc-b9a9-c64afd7be96b" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_169ef50e-a4f7-4397-b3e9-285bf1a6f6d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:to="loc_us-gaap_FinancialInstrumentAxis_169ef50e-a4f7-4397-b3e9-285bf1a6f6d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_169ef50e-a4f7-4397-b3e9-285bf1a6f6d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_169ef50e-a4f7-4397-b3e9-285bf1a6f6d1" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_169ef50e-a4f7-4397-b3e9-285bf1a6f6d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f8f62a41-0a94-4ce9-91a2-60d1bc4b9c63" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_169ef50e-a4f7-4397-b3e9-285bf1a6f6d1" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f8f62a41-0a94-4ce9-91a2-60d1bc4b9c63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_CorporateDebtLimitedObservableInputsMember_1dc04a02-4bdd-4a8b-b669-c879cb53b83e" xlink:href="pra-20240930.xsd#pra_CorporateDebtLimitedObservableInputsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f8f62a41-0a94-4ce9-91a2-60d1bc4b9c63" xlink:to="loc_pra_CorporateDebtLimitedObservableInputsMember_1dc04a02-4bdd-4a8b-b669-c879cb53b83e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_86f4c3c2-ea91-4715-9f53-65f55b8280f8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f8f62a41-0a94-4ce9-91a2-60d1bc4b9c63" xlink:to="loc_us-gaap_MortgageBackedSecuritiesMember_86f4c3c2-ea91-4715-9f53-65f55b8280f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cd4ba4e4-9ddd-420a-b36a-95ffca6420fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cd4ba4e4-9ddd-420a-b36a-95ffca6420fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cd4ba4e4-9ddd-420a-b36a-95ffca6420fe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cd4ba4e4-9ddd-420a-b36a-95ffca6420fe" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cd4ba4e4-9ddd-420a-b36a-95ffca6420fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_afa9d271-3651-4922-bdb8-e0d34136e697" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_cd4ba4e4-9ddd-420a-b36a-95ffca6420fe" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_afa9d271-3651-4922-bdb8-e0d34136e697" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_36a64350-39b0-4d09-82cf-94227b72fc75" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_afa9d271-3651-4922-bdb8-e0d34136e697" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_36a64350-39b0-4d09-82cf-94227b72fc75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_ae364fff-dbf1-4101-879b-8a22c67e2e59" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_ae364fff-dbf1-4101-879b-8a22c67e2e59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_ae364fff-dbf1-4101-879b-8a22c67e2e59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_ae364fff-dbf1-4101-879b-8a22c67e2e59" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_ae364fff-dbf1-4101-879b-8a22c67e2e59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_d9a783f7-81fa-4021-b916-4890d68eb7ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_ae364fff-dbf1-4101-879b-8a22c67e2e59" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_d9a783f7-81fa-4021-b916-4890d68eb7ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputComparabilityAdjustmentMember_9afe1026-f1dd-4375-8fbc-c0c911428364" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputComparabilityAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_d9a783f7-81fa-4021-b916-4890d68eb7ee" xlink:to="loc_us-gaap_MeasurementInputComparabilityAdjustmentMember_9afe1026-f1dd-4375-8fbc-c0c911428364" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_MeasurementInputWeightedAverageCostOfCapitalMember_d470160c-3b0f-4b9a-899b-afd3003614b5" xlink:href="pra-20240930.xsd#pra_MeasurementInputWeightedAverageCostOfCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_d9a783f7-81fa-4021-b916-4890d68eb7ee" xlink:to="loc_pra_MeasurementInputWeightedAverageCostOfCapitalMember_d470160c-3b0f-4b9a-899b-afd3003614b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_40167cd1-57dd-41af-a136-ba0ac7bf3682" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:to="loc_us-gaap_ValuationTechniqueAxis_40167cd1-57dd-41af-a136-ba0ac7bf3682" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_40167cd1-57dd-41af-a136-ba0ac7bf3682_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_40167cd1-57dd-41af-a136-ba0ac7bf3682" xlink:to="loc_us-gaap_ValuationTechniqueDomain_40167cd1-57dd-41af-a136-ba0ac7bf3682_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_308f3f10-b99c-46a2-bdef-2841ea27cde0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_40167cd1-57dd-41af-a136-ba0ac7bf3682" xlink:to="loc_us-gaap_ValuationTechniqueDomain_308f3f10-b99c-46a2-bdef-2841ea27cde0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_ad237716-2e42-4753-aeee-bad443bb6502" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MarketApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_308f3f10-b99c-46a2-bdef-2841ea27cde0" xlink:to="loc_us-gaap_MarketApproachValuationTechniqueMember_ad237716-2e42-4753-aeee-bad443bb6502" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeApproachValuationTechniqueMember_023fcf1a-49ad-48be-949d-e647abe89898" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_308f3f10-b99c-46a2-bdef-2841ea27cde0" xlink:to="loc_us-gaap_IncomeApproachValuationTechniqueMember_023fcf1a-49ad-48be-949d-e647abe89898" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ValuationTechniqueMonteCarloSimulationAndDiscountedCashFlowsMember_e4bfad3a-5698-4f2c-bda8-2c0664998dff" xlink:href="pra-20240930.xsd#pra_ValuationTechniqueMonteCarloSimulationAndDiscountedCashFlowsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_308f3f10-b99c-46a2-bdef-2841ea27cde0" xlink:to="loc_pra_ValuationTechniqueMonteCarloSimulationAndDiscountedCashFlowsMember_e4bfad3a-5698-4f2c-bda8-2c0664998dff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_915efbe4-a50a-46da-b9a5-d4fe710b46e7" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_fbf76ac1-e68a-40a9-b2ce-5a537bbed637" xlink:to="loc_srt_RangeAxis_915efbe4-a50a-46da-b9a5-d4fe710b46e7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_915efbe4-a50a-46da-b9a5-d4fe710b46e7_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_915efbe4-a50a-46da-b9a5-d4fe710b46e7" xlink:to="loc_srt_RangeMember_915efbe4-a50a-46da-b9a5-d4fe710b46e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d629d28e-9808-471b-bf49-367ec004c79a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_915efbe4-a50a-46da-b9a5-d4fe710b46e7" xlink:to="loc_srt_RangeMember_d629d28e-9808-471b-bf49-367ec004c79a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_2e17b893-1951-47f1-8a61-0adbb15b71ec" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d629d28e-9808-471b-bf49-367ec004c79a" xlink:to="loc_srt_MinimumMember_2e17b893-1951-47f1-8a61-0adbb15b71ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_1f7d0bcd-018d-40d5-b91d-7eb4baf612da" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d629d28e-9808-471b-bf49-367ec004c79a" xlink:to="loc_srt_MaximumMember_1f7d0bcd-018d-40d5-b91d-7eb4baf612da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_d15b6aeb-4782-479f-9c29-0377558b1a20" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d629d28e-9808-471b-bf49-367ec004c79a" xlink:to="loc_srt_WeightedAverageMember_d15b6aeb-4782-479f-9c29-0377558b1a20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_31073495-acf8-43bc-b9a9-c64afd7be96b" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_d4264964-8947-42d9-bd4a-e8a8cfcd8ce1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_d4264964-8947-42d9-bd4a-e8a8cfcd8ce1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_54405a33-0a7c-49e2-b3c1-f9b87e83fe9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_54405a33-0a7c-49e2-b3c1-f9b87e83fe9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestment_3d559f80-efd3-426c-bdf6-98f5c10f8277" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AlternativeInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:to="loc_us-gaap_AlternativeInvestment_3d559f80-efd3-426c-bdf6-98f5c10f8277" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_c82f619b-1183-4f5b-9d89-94d0e94162ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_c82f619b-1183-4f5b-9d89-94d0e94162ab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiMeasurementInput_f2f241c3-da95-4e97-b2d1-d0577797b4ad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesFvNiMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:to="loc_us-gaap_EquitySecuritiesFvNiMeasurementInput_f2f241c3-da95-4e97-b2d1-d0577797b4ad" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestmentMeasurementInput_7ea2247b-4f2d-42e7-81f4-a10ba94821b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AlternativeInvestmentMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_0f81c592-a253-4e3a-a585-56514ffc9f76" xlink:to="loc_us-gaap_AlternativeInvestmentMeasurementInput_7ea2247b-4f2d-42e7-81f4-a10ba94821b5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_60687e9f-0c4c-4911-a782-c16e9d0e1b89" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_31073495-acf8-43bc-b9a9-c64afd7be96b" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_60687e9f-0c4c-4911-a782-c16e9d0e1b89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_81a0d968-23e6-4e3f-9a01-44be7627079e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_60687e9f-0c4c-4911-a782-c16e9d0e1b89" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_81a0d968-23e6-4e3f-9a01-44be7627079e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherLiabilitiesMeasurementInput_d78b7da0-3178-48b9-8b98-fa68d7acc690" xlink:href="pra-20240930.xsd#pra_OtherLiabilitiesMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_60687e9f-0c4c-4911-a782-c16e9d0e1b89" xlink:to="loc_pra_OtherLiabilitiesMeasurementInput_d78b7da0-3178-48b9-8b98-fa68d7acc690" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/FairValueMeasurementLevel3AssetsandLiabilityDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#FairValueMeasurementLevel3AssetsandLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/FairValueMeasurementLevel3AssetsandLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_90399da4-2747-401e-9042-c83408f3657c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_90399da4-2747-401e-9042-c83408f3657c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_abe20fc1-1863-45bf-b28d-5aa9335baef7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_90399da4-2747-401e-9042-c83408f3657c" xlink:to="loc_us-gaap_FinancialInstrumentAxis_abe20fc1-1863-45bf-b28d-5aa9335baef7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_abe20fc1-1863-45bf-b28d-5aa9335baef7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_abe20fc1-1863-45bf-b28d-5aa9335baef7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_abe20fc1-1863-45bf-b28d-5aa9335baef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_abe20fc1-1863-45bf-b28d-5aa9335baef7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_9e55988c-9190-4165-9dbf-6abecff1264d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_9e55988c-9190-4165-9dbf-6abecff1264d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_38895c7e-ce1e-4a23-8661-1a9a1bd35721" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_38895c7e-ce1e-4a23-8661-1a9a1bd35721" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_16182252-a76f-4a71-9da0-c0981c25528d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:to="loc_us-gaap_EquitySecuritiesMember_16182252-a76f-4a71-9da0-c0981c25528d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestmentsMember_08c664ac-b209-4587-ae3e-156087a71552" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:to="loc_us-gaap_OtherInvestmentsMember_08c664ac-b209-4587-ae3e-156087a71552" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesMember_8ccda913-4255-49cb-b65c-be046c8040b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1d77940a-7da6-42ae-a722-c7a2d841d362" xlink:to="loc_us-gaap_OtherLiabilitiesMember_8ccda913-4255-49cb-b65c-be046c8040b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6449440e-c5d3-4d17-b985-a74f0a520911" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_90399da4-2747-401e-9042-c83408f3657c" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_6449440e-c5d3-4d17-b985-a74f0a520911" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_6449440e-c5d3-4d17-b985-a74f0a520911_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6449440e-c5d3-4d17-b985-a74f0a520911" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_6449440e-c5d3-4d17-b985-a74f0a520911_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_66bea50c-183b-4121-9cd9-eded084312df" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6449440e-c5d3-4d17-b985-a74f0a520911" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_66bea50c-183b-4121-9cd9-eded084312df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestmentsMember1_4bbc7860-abee-49c6-8791-79f9b12d5e10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainLossOnInvestmentsMember1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_66bea50c-183b-4121-9cd9-eded084312df" xlink:to="loc_us-gaap_GainLossOnInvestmentsMember1_4bbc7860-abee-49c6-8791-79f9b12d5e10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NetInvestmentIncomeMember_4fadf610-021b-427b-b8f3-89277739673c" xlink:href="pra-20240930.xsd#pra_NetInvestmentIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_66bea50c-183b-4121-9cd9-eded084312df" xlink:to="loc_pra_NetInvestmentIncomeMember_4fadf610-021b-427b-b8f3-89277739673c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_8dda9d66-720c-43e4-8fd1-7c01d047abcd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_8dda9d66-720c-43e4-8fd1-7c01d047abcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_GainsLossesRealizedAndUnrealizedAssetsAbstract_4396f184-69d4-4788-8401-2f500ae75e4d" xlink:href="pra-20240930.xsd#pra_GainsLossesRealizedAndUnrealizedAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:to="loc_pra_GainsLossesRealizedAndUnrealizedAssetsAbstract_4396f184-69d4-4788-8401-2f500ae75e4d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:href="pra-20240930.xsd#pra_GainsLossesByEarningsCategoryAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesRealizedAndUnrealizedAssetsAbstract_4396f184-69d4-4788-8401-2f500ae75e4d" xlink:to="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_6da7710d-e738-460c-be00-fc70ead81c25" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_6da7710d-e738-460c-be00-fc70ead81c25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_f169d70c-894b-45af-a285-2a7344be7d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleList_f169d70c-894b-45af-a285-2a7344be7d2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_648bc6ac-5245-46ca-942e-cd617474c3fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_648bc6ac-5245-46ca-942e-cd617474c3fc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleList_71cb6c79-ee64-4cbd-a326-45187a241c70" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleList_71cb6c79-ee64-4cbd-a326-45187a241c70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOperatingExpenses_b5f9c06d-ee42-4aa6-b7ff-94c09d4e8fe8" xlink:href="pra-20240930.xsd#pra_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesByEarningsCategoryAssetsAbstract_bc47d9dd-b08e-4141-9140-a000fb282d11" xlink:to="loc_pra_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOperatingExpenses_b5f9c06d-ee42-4aa6-b7ff-94c09d4e8fe8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_f7d5cad3-7a57-4df1-bb42-c25f3ba039a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesRealizedAndUnrealizedAssetsAbstract_4396f184-69d4-4788-8401-2f500ae75e4d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_f7d5cad3-7a57-4df1-bb42-c25f3ba039a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_221eee67-fc8e-4fa8-bc94-6a3d9af51db9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_221eee67-fc8e-4fa8-bc94-6a3d9af51db9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_e56eacd2-c0ad-48d3-8d75-ebde876427dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_e56eacd2-c0ad-48d3-8d75-ebde876427dd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_a7d8f045-d30e-445a-b38c-cdf71fea3d95" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_a7d8f045-d30e-445a-b38c-cdf71fea3d95" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_54d82889-0e2b-4a4c-840b-c9b461e018da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_91becff7-274d-4ce2-9d4c-97b236feb4a2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_54d82889-0e2b-4a4c-840b-c9b461e018da" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_a84874b8-ac2d-49c3-957a-d2d43f5cbd8d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_e810be00-3706-4ce7-a868-10bbc48d4bae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_e810be00-3706-4ce7-a868-10bbc48d4bae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleListNotDisclosedFlag_b9c15f71-ce08-4dd5-ab7b-252ce3530a77" xlink:href="pra-20240930.xsd#pra_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleListNotDisclosedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:to="loc_pra_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleListNotDisclosedFlag_b9c15f71-ce08-4dd5-ab7b-252ce3530a77" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_c06b192b-4298-4ad9-87fc-f70d5375801a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_c06b192b-4298-4ad9-87fc-f70d5375801a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_GainsLossesRealizedAndUnrealizedLiabilitiesAbstract_03ec3c1e-e8fe-44b2-96fd-e78e60178fe3" xlink:href="pra-20240930.xsd#pra_GainsLossesRealizedAndUnrealizedLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_pra_GainsLossesRealizedAndUnrealizedLiabilitiesAbstract_03ec3c1e-e8fe-44b2-96fd-e78e60178fe3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_f9a39ccf-c018-472b-a1dc-906d4aa3433f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesRealizedAndUnrealizedLiabilitiesAbstract_03ec3c1e-e8fe-44b2-96fd-e78e60178fe3" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_f9a39ccf-c018-472b-a1dc-906d4aa3433f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesOperatingExpenses_8d51625f-16a8-430d-83e1-7a42921a93fa" xlink:href="pra-20240930.xsd#pra_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesOperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_GainsLossesRealizedAndUnrealizedLiabilitiesAbstract_03ec3c1e-e8fe-44b2-96fd-e78e60178fe3" xlink:to="loc_pra_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitiesOperatingExpenses_8d51625f-16a8-430d-83e1-7a42921a93fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_98f46605-36a6-42be-af6a-d299dd922383" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_98f46605-36a6-42be-af6a-d299dd922383" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_5d000609-8409-4976-8a8d-3b8063259108" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_5d000609-8409-4976-8a8d-3b8063259108" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales_8703d310-120a-4132-863c-a7c818bd2511" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales_8703d310-120a-4132-863c-a7c818bd2511" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3_2e6bb4bf-d158-47b9-ba49-757b092740a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3_2e6bb4bf-d158-47b9-ba49-757b092740a6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3_68464af9-e74d-4c2b-8444-27f4892750be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_f410973b-c432-48ef-99ef-f89b30292c3e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3_68464af9-e74d-4c2b-8444-27f4892750be" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1ab69f15-90be-4180-8b02-162714293283" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_b586bc7e-a2e2-43c6-9cd3-6256eaf4e5a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_fc2092ed-d316-49c3-b1a5-3f1cb7a2b9b2" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_b586bc7e-a2e2-43c6-9cd3-6256eaf4e5a1" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/FairValueMeasurementInvestmentsinLLCsandLimitedPartnershipsDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#FairValueMeasurementInvestmentsinLLCsandLimitedPartnershipsDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/FairValueMeasurementInvestmentsinLLCsandLimitedPartnershipsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_43c60c87-a479-40a6-9a0d-6bb47cc4d664" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_43c60c87-a479-40a6-9a0d-6bb47cc4d664" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_507affb0-87bb-41e2-8ea3-c1647f7419b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_43c60c87-a479-40a6-9a0d-6bb47cc4d664" xlink:to="loc_us-gaap_InvestmentTypeAxis_507affb0-87bb-41e2-8ea3-c1647f7419b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_507affb0-87bb-41e2-8ea3-c1647f7419b6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_507affb0-87bb-41e2-8ea3-c1647f7419b6" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_507affb0-87bb-41e2-8ea3-c1647f7419b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_507affb0-87bb-41e2-8ea3-c1647f7419b6" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_PrivateDebtFundsMember_b4fef90d-d8bc-4cf8-93f7-b10798c51503" xlink:href="pra-20240930.xsd#pra_PrivateDebtFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:to="loc_pra_PrivateDebtFundsMember_b4fef90d-d8bc-4cf8-93f7-b10798c51503" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LongshortEquityFundsMember_e51d7fb9-7655-4d85-b0d0-6390ce530b0c" xlink:href="pra-20240930.xsd#pra_LongshortEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:to="loc_pra_LongshortEquityFundsMember_e51d7fb9-7655-4d85-b0d0-6390ce530b0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_ed8c989f-5b9e-4c10-ba53-96c834bc35eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:to="loc_us-gaap_PrivateEquityFundsMember_ed8c989f-5b9e-4c10-ba53-96c834bc35eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_StructuredCreditFundMember_5e760f1e-9dc7-4289-8e30-a252232da429" xlink:href="pra-20240930.xsd#pra_StructuredCreditFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:to="loc_pra_StructuredCreditFundMember_5e760f1e-9dc7-4289-8e30-a252232da429" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_StrategyFocusedFundMember_1cc5c3cc-dd31-49ec-8dfe-68bdd57c9e78" xlink:href="pra-20240930.xsd#pra_StrategyFocusedFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_fff84e9e-2341-4c5d-a410-efe72d7dec98" xlink:to="loc_pra_StrategyFocusedFundMember_1cc5c3cc-dd31-49ec-8dfe-68bdd57c9e78" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_66ee9f6b-d5ef-4815-a6d8-87c6412897e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_43c60c87-a479-40a6-9a0d-6bb47cc4d664" xlink:to="loc_us-gaap_FinancialInstrumentAxis_66ee9f6b-d5ef-4815-a6d8-87c6412897e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_66ee9f6b-d5ef-4815-a6d8-87c6412897e6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_66ee9f6b-d5ef-4815-a6d8-87c6412897e6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_66ee9f6b-d5ef-4815-a6d8-87c6412897e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c035542e-3c21-434e-8be3-307ee423e5fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_66ee9f6b-d5ef-4815-a6d8-87c6412897e6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c035542e-3c21-434e-8be3-307ee423e5fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentsInUnconsolidatedSubsidiariesMember_4ce74dbb-a65a-49b7-9d77-f63c7230c110" xlink:href="pra-20240930.xsd#pra_InvestmentsInUnconsolidatedSubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_c035542e-3c21-434e-8be3-307ee423e5fd" xlink:to="loc_pra_InvestmentsInUnconsolidatedSubsidiariesMember_4ce74dbb-a65a-49b7-9d77-f63c7230c110" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_572d3d53-1298-47a1-abf9-3b4e61ad7cbe" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_43c60c87-a479-40a6-9a0d-6bb47cc4d664" xlink:to="loc_srt_RangeAxis_572d3d53-1298-47a1-abf9-3b4e61ad7cbe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_572d3d53-1298-47a1-abf9-3b4e61ad7cbe_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_572d3d53-1298-47a1-abf9-3b4e61ad7cbe" xlink:to="loc_srt_RangeMember_572d3d53-1298-47a1-abf9-3b4e61ad7cbe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e9d55cfc-f114-4f38-a8cc-c73662d0e6cf" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_572d3d53-1298-47a1-abf9-3b4e61ad7cbe" xlink:to="loc_srt_RangeMember_e9d55cfc-f114-4f38-a8cc-c73662d0e6cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_951643ca-8560-4a5f-a805-45c06b0a8e7e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e9d55cfc-f114-4f38-a8cc-c73662d0e6cf" xlink:to="loc_srt_MinimumMember_951643ca-8560-4a5f-a805-45c06b0a8e7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e6c78927-42a1-4041-a3ec-f6fd0b863b7c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e9d55cfc-f114-4f38-a8cc-c73662d0e6cf" xlink:to="loc_srt_MaximumMember_e6c78927-42a1-4041-a3ec-f6fd0b863b7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_5d16cf2a-dec4-45d3-9c29-8414e5666394" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_5d16cf2a-dec4-45d3-9c29-8414e5666394" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestment_11304b7d-d9bc-43f9-b287-adb45b37b59f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AlternativeInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_us-gaap_AlternativeInvestment_11304b7d-d9bc-43f9-b287-adb45b37b59f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberofLimitedPartnersInInvestment_cf27048e-34eb-4c07-ad30-b262dadd165b" xlink:href="pra-20240930.xsd#pra_NumberofLimitedPartnersInInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_NumberofLimitedPartnersInInvestment_cf27048e-34eb-4c07-ad30-b262dadd165b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberofLimitedPartnerstoAllowRedemptionbySpecialConsent_c963bc0c-dcdd-4224-8803-a0e9f2116e30" xlink:href="pra-20240930.xsd#pra_NumberofLimitedPartnerstoAllowRedemptionbySpecialConsent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_NumberofLimitedPartnerstoAllowRedemptionbySpecialConsent_c963bc0c-dcdd-4224-8803-a0e9f2116e30" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_841df752-bfff-4a8e-a98b-16cae4f22b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_841df752-bfff-4a8e-a98b-16cae4f22b2e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_PaymentPeriodForRedemptionOfLPValuedAtNAV_fc97603d-e43a-40f4-9241-6d6a25d89dff" xlink:href="pra-20240930.xsd#pra_PaymentPeriodForRedemptionOfLPValuedAtNAV"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_PaymentPeriodForRedemptionOfLPValuedAtNAV_fc97603d-e43a-40f4-9241-6d6a25d89dff" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_FairValueInvestmentsEntitiesThatCalculateNetAssetValueInvestmentRedemptionNoticePeriodOneFund_61bbda53-8673-4db0-b248-656611e8bfd3" xlink:href="pra-20240930.xsd#pra_FairValueInvestmentsEntitiesThatCalculateNetAssetValueInvestmentRedemptionNoticePeriodOneFund"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_FairValueInvestmentsEntitiesThatCalculateNetAssetValueInvestmentRedemptionNoticePeriodOneFund_61bbda53-8673-4db0-b248-656611e8bfd3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberOfLimitedPartnersToAllowRedemptionBySpecialConsentOfPartner_0d514891-01e3-4ebd-98f1-5bf1030141af" xlink:href="pra-20240930.xsd#pra_NumberOfLimitedPartnersToAllowRedemptionBySpecialConsentOfPartner"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_NumberOfLimitedPartnersToAllowRedemptionBySpecialConsentOfPartner_0d514891-01e3-4ebd-98f1-5bf1030141af" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberOfLimitedPartnersNotPermittedForRedemption_8fac4873-7b20-4f26-adce-1b7ebe803120" xlink:href="pra-20240930.xsd#pra_NumberOfLimitedPartnersNotPermittedForRedemption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_NumberOfLimitedPartnersNotPermittedForRedemption_8fac4873-7b20-4f26-adce-1b7ebe803120" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberOfLimitedPartnersRedemptionAllowedWithPriorNotice_5e40ce6f-9a24-4a8f-8d6b-de55d6dda160" xlink:href="pra-20240930.xsd#pra_NumberOfLimitedPartnersRedemptionAllowedWithPriorNotice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_68ce4e35-cd0f-4729-ab89-294ddc30204a" xlink:to="loc_pra_NumberOfLimitedPartnersRedemptionAllowedWithPriorNotice_5e40ce6f-9a24-4a8f-8d6b-de55d6dda160" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/FairValueMeasurementNarrativeDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#FairValueMeasurementNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/FairValueMeasurementNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditDerivativesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCreditDerivativesTable_3ba34f31-5a35-4863-8f69-65ea6e068eef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfCreditDerivativesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:to="loc_us-gaap_ScheduleOfCreditDerivativesTable_3ba34f31-5a35-4863-8f69-65ea6e068eef" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8e24c765-c93a-41ea-9c6e-323faeb44a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCreditDerivativesTable_3ba34f31-5a35-4863-8f69-65ea6e068eef" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8e24c765-c93a-41ea-9c6e-323faeb44a4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_8e24c765-c93a-41ea-9c6e-323faeb44a4b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8e24c765-c93a-41ea-9c6e-323faeb44a4b" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_8e24c765-c93a-41ea-9c6e-323faeb44a4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_b29a232f-e73d-4dc4-9e45-0cb9b3477a91" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_8e24c765-c93a-41ea-9c6e-323faeb44a4b" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_b29a232f-e73d-4dc4-9e45-0cb9b3477a91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_309d8f36-f5ef-4fac-afb7-3ff4f09f7cc8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_b29a232f-e73d-4dc4-9e45-0cb9b3477a91" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_309d8f36-f5ef-4fac-afb7-3ff4f09f7cc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_158a2c3c-d481-4059-b43a-9af54bca0328" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCreditDerivativesTable_3ba34f31-5a35-4863-8f69-65ea6e068eef" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_158a2c3c-d481-4059-b43a-9af54bca0328" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_158a2c3c-d481-4059-b43a-9af54bca0328_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_158a2c3c-d481-4059-b43a-9af54bca0328" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_158a2c3c-d481-4059-b43a-9af54bca0328_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_69e67f66-8266-474f-ad9a-3ed9cf9b004c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_158a2c3c-d481-4059-b43a-9af54bca0328" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_69e67f66-8266-474f-ad9a-3ed9cf9b004c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_8a85ceca-2596-4443-a59b-f26690c99a7d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_69e67f66-8266-474f-ad9a-3ed9cf9b004c" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_8a85ceca-2596-4443-a59b-f26690c99a7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_e0fb0edd-5470-4c10-88c2-ecbbca7f13c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_8a85ceca-2596-4443-a59b-f26690c99a7d" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_e0fb0edd-5470-4c10-88c2-ecbbca7f13c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitAxis_3a454667-1e27-49a3-8814-286ad8eb2546" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCreditDerivativesTable_3ba34f31-5a35-4863-8f69-65ea6e068eef" xlink:to="loc_us-gaap_ReportingUnitAxis_3a454667-1e27-49a3-8814-286ad8eb2546" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_3a454667-1e27-49a3-8814-286ad8eb2546_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReportingUnitAxis_3a454667-1e27-49a3-8814-286ad8eb2546" xlink:to="loc_us-gaap_ReportingUnitDomain_3a454667-1e27-49a3-8814-286ad8eb2546_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_6b18e3b6-5331-4e5f-acc2-09720f41150f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReportingUnitAxis_3a454667-1e27-49a3-8814-286ad8eb2546" xlink:to="loc_us-gaap_ReportingUnitDomain_6b18e3b6-5331-4e5f-acc2-09720f41150f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_WorkersCompensationInsuranceReportingUnitMember_53e15374-4e0f-4407-9d8e-7a65e833362d" xlink:href="pra-20240930.xsd#pra_WorkersCompensationInsuranceReportingUnitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_6b18e3b6-5331-4e5f-acc2-09720f41150f" xlink:to="loc_pra_WorkersCompensationInsuranceReportingUnitMember_53e15374-4e0f-4407-9d8e-7a65e833362d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_7a81beab-5e6f-4188-972e-040eb7eb5db1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_7a81beab-5e6f-4188-972e-040eb7eb5db1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetAssetLiability_643a37bb-6189-40f4-b366-580ee551d9dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueNetAssetLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:to="loc_us-gaap_FairValueNetAssetLiability_643a37bb-6189-40f4-b366-580ee551d9dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberOfInsuranceSubsidiaries_a0c34cb2-384d-4ad1-b4d0-4c4d7df270bf" xlink:href="pra-20240930.xsd#pra_NumberOfInsuranceSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:to="loc_pra_NumberOfInsuranceSubsidiaries_a0c34cb2-384d-4ad1-b4d0-4c4d7df270bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_bcdebd57-3d39-45cc-84fe-f88c18fe7986" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_bcdebd57-3d39-45cc-84fe-f88c18fe7986" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_79e7f460-5d24-45bc-b8c6-5a81625877f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditDerivativesLineItems_6eff4bcc-c053-4b4a-bf27-7c58aa151deb" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_79e7f460-5d24-45bc-b8c6-5a81625877f9" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/FairValueMeasurementFinancialInstrumentsNotMeasuredatFairValueDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#FairValueMeasurementFinancialInstrumentsNotMeasuredatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/FairValueMeasurementFinancialInstrumentsNotMeasuredatFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7a73ab71-bf18-43a2-adab-2adbe478da71" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7f166f57-8bf8-4c4b-8156-0dd55edbf282" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7a73ab71-bf18-43a2-adab-2adbe478da71" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7f166f57-8bf8-4c4b-8156-0dd55edbf282" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_624d0993-e6b4-4876-aad1-fde5228ffe50" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7f166f57-8bf8-4c4b-8156-0dd55edbf282" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_624d0993-e6b4-4876-aad1-fde5228ffe50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_624d0993-e6b4-4876-aad1-fde5228ffe50_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_624d0993-e6b4-4876-aad1-fde5228ffe50" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_624d0993-e6b4-4876-aad1-fde5228ffe50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_868d8d1c-57c7-46a9-bae4-6c3d800452e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_624d0993-e6b4-4876-aad1-fde5228ffe50" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_868d8d1c-57c7-46a9-bae4-6c3d800452e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_e4a2318c-d21b-4b2a-9b16-9aec4e6bc933" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_868d8d1c-57c7-46a9-bae4-6c3d800452e8" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_e4a2318c-d21b-4b2a-9b16-9aec4e6bc933" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_3d2bc7d6-989f-46e2-9c1a-27e35ee18184" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_e4a2318c-d21b-4b2a-9b16-9aec4e6bc933" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_3d2bc7d6-989f-46e2-9c1a-27e35ee18184" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_15181704-f560-44cd-b687-b293cb93e36e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_e4a2318c-d21b-4b2a-9b16-9aec4e6bc933" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_15181704-f560-44cd-b687-b293cb93e36e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_fc64b732-daba-4777-b82a-6efb1232504c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7f166f57-8bf8-4c4b-8156-0dd55edbf282" xlink:to="loc_us-gaap_FinancialInstrumentAxis_fc64b732-daba-4777-b82a-6efb1232504c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fc64b732-daba-4777-b82a-6efb1232504c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_fc64b732-daba-4777-b82a-6efb1232504c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fc64b732-daba-4777-b82a-6efb1232504c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ceea6f0f-9977-4f35-a005-d02f357529ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_fc64b732-daba-4777-b82a-6efb1232504c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ceea6f0f-9977-4f35-a005-d02f357529ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashSurrenderValueMember_9239630f-8446-45de-9c9e-df3e5ed4907f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashSurrenderValueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ceea6f0f-9977-4f35-a005-d02f357529ce" xlink:to="loc_us-gaap_CashSurrenderValueMember_9239630f-8446-45de-9c9e-df3e5ed4907f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestmentsMember_0a598b1a-83b1-437b-9e7d-1e4cdf303532" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ceea6f0f-9977-4f35-a005-d02f357529ce" xlink:to="loc_us-gaap_OtherInvestmentsMember_0a598b1a-83b1-437b-9e7d-1e4cdf303532" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_c669cf8d-ecde-4b95-ac24-d188395a15fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7f166f57-8bf8-4c4b-8156-0dd55edbf282" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_c669cf8d-ecde-4b95-ac24-d188395a15fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c669cf8d-ecde-4b95-ac24-d188395a15fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c669cf8d-ecde-4b95-ac24-d188395a15fd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c669cf8d-ecde-4b95-ac24-d188395a15fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_b0ebe9ea-3f23-426b-9a5c-0d2c881c978b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c669cf8d-ecde-4b95-ac24-d188395a15fd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_b0ebe9ea-3f23-426b-9a5c-0d2c881c978b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_TermLoanMember_b2845613-65e8-4127-9064-1c474c382ba6" xlink:href="pra-20240930.xsd#pra_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_b0ebe9ea-3f23-426b-9a5c-0d2c881c978b" xlink:to="loc_pra_TermLoanMember_b2845613-65e8-4127-9064-1c474c382ba6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ContributionCertificateDue2031Member_92d242a0-aecf-4761-a5cd-bc0a16130cb9" xlink:href="pra-20240930.xsd#pra_ContributionCertificateDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_b0ebe9ea-3f23-426b-9a5c-0d2c881c978b" xlink:to="loc_pra_ContributionCertificateDue2031Member_92d242a0-aecf-4761-a5cd-bc0a16130cb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_421934ad-e350-4a67-918d-fbba9fd5fe45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_7f166f57-8bf8-4c4b-8156-0dd55edbf282" xlink:to="loc_us-gaap_CreditFacilityAxis_421934ad-e350-4a67-918d-fbba9fd5fe45" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_421934ad-e350-4a67-918d-fbba9fd5fe45_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_421934ad-e350-4a67-918d-fbba9fd5fe45" xlink:to="loc_us-gaap_CreditFacilityDomain_421934ad-e350-4a67-918d-fbba9fd5fe45_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_3b44422e-e0bc-4509-a392-a6a61ae93ab8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_421934ad-e350-4a67-918d-fbba9fd5fe45" xlink:to="loc_us-gaap_CreditFacilityDomain_3b44422e-e0bc-4509-a392-a6a61ae93ab8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_06819eb1-8c57-4830-95e9-f8304b42455c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3b44422e-e0bc-4509-a392-a6a61ae93ab8" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_06819eb1-8c57-4830-95e9-f8304b42455c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4af77279-f71d-4c63-b43f-a3bed56481be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7a73ab71-bf18-43a2-adab-2adbe478da71" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4af77279-f71d-4c63-b43f-a3bed56481be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_02ad6899-2c57-4bda-a46e-b82452aa11d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4af77279-f71d-4c63-b43f-a3bed56481be" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_02ad6899-2c57-4bda-a46e-b82452aa11d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_a181cb20-83e7-4d6b-9099-a4757e01c46f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_4af77279-f71d-4c63-b43f-a3bed56481be" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_a181cb20-83e7-4d6b-9099-a4757e01c46f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_e8472e75-c3bf-428b-acc2-601376456217" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7a73ab71-bf18-43a2-adab-2adbe478da71" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_e8472e75-c3bf-428b-acc2-601376456217" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_dda9dda2-535f-47fc-83ca-29da4e98f0e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_e8472e75-c3bf-428b-acc2-601376456217" xlink:to="loc_us-gaap_DebtInstrumentFairValue_dda9dda2-535f-47fc-83ca-29da4e98f0e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LongTermDebtAndContributionCertificatesFairValueDisclosure_0eb935cb-7c7b-464b-80a3-8d322a694d18" xlink:href="pra-20240930.xsd#pra_LongTermDebtAndContributionCertificatesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_e8472e75-c3bf-428b-acc2-601376456217" xlink:to="loc_pra_LongTermDebtAndContributionCertificatesFairValueDisclosure_0eb935cb-7c7b-464b-80a3-8d322a694d18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_3491f7d3-b88c-4e86-a56a-d15d07e254e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_e8472e75-c3bf-428b-acc2-601376456217" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_3491f7d3-b88c-4e86-a56a-d15d07e254e8" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsAvailableForSaleFixedMaturitiesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsAvailableForSaleFixedMaturitiesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsAvailableForSaleFixedMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_e7a6a10f-8270-49ba-8228-f36ba038a877" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_e7a6a10f-8270-49ba-8228-f36ba038a877" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_65d68094-0832-487d-9039-ef940806020d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_e7a6a10f-8270-49ba-8228-f36ba038a877" xlink:to="loc_us-gaap_FinancialInstrumentAxis_65d68094-0832-487d-9039-ef940806020d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_65d68094-0832-487d-9039-ef940806020d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_65d68094-0832-487d-9039-ef940806020d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_65d68094-0832-487d-9039-ef940806020d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_65d68094-0832-487d-9039-ef940806020d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_d32e9bd1-367d-4f02-9601-8a9224b42ee0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_d32e9bd1-367d-4f02-9601-8a9224b42ee0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_07b62fc1-2a1f-4d5a-8053-7bd60aeb21cb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_07b62fc1-2a1f-4d5a-8053-7bd60aeb21cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_b7cbb6ea-1de9-418a-bbd4-33e06662b105" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_b7cbb6ea-1de9-418a-bbd4-33e06662b105" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_3da2ff1b-516c-43c3-8a25-003a0bb44f09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_3da2ff1b-516c-43c3-8a25-003a0bb44f09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_07a7cb86-e1f2-4d17-8f3e-05256c09d03d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_07a7cb86-e1f2-4d17-8f3e-05256c09d03d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_0631e362-ac16-403f-b045-6f041d00ea2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_0631e362-ac16-403f-b045-6f041d00ea2e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_39b64211-e824-4be3-8e8b-7da193987902" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_39b64211-e824-4be3-8e8b-7da193987902" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_8982a7f7-9442-427d-af8d-9a1d5c8f6e1a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_53b1d3c8-140b-47d5-83e5-7716a8366d0c" xlink:to="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_8982a7f7-9442-427d-af8d-9a1d5c8f6e1a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_b61fbd83-6605-4865-a6c8-86f00ac5a9e2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_b61fbd83-6605-4865-a6c8-86f00ac5a9e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_16bb5e4e-cf23-4263-b73b-61f0d468b6e1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_16bb5e4e-cf23-4263-b73b-61f0d468b6e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_71ec0747-7050-44c0-abc1-ca318bed41b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_71ec0747-7050-44c0-abc1-ca318bed41b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_c45abf45-0fdf-47b9-9e00-e214ceae360d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_c45abf45-0fdf-47b9-9e00-e214ceae360d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_760621ce-40dd-4bee-88c0-b73a73fe610e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5daa0f9d-fe1f-480d-8dae-27ca8e441c15" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_760621ce-40dd-4bee-88c0-b73a73fe610e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsAvailableForSaleSecuritiesbyContractualMaturityDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsAvailableForSaleSecuritiesbyContractualMaturityDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsAvailableForSaleSecuritiesbyContractualMaturityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_d67bdeca-3404-43dd-bec4-3ac7b9ba118f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_d67bdeca-3404-43dd-bec4-3ac7b9ba118f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_edd35c6d-91f3-4a12-97b5-67c6412060f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_d67bdeca-3404-43dd-bec4-3ac7b9ba118f" xlink:to="loc_us-gaap_FinancialInstrumentAxis_edd35c6d-91f3-4a12-97b5-67c6412060f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_edd35c6d-91f3-4a12-97b5-67c6412060f0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_edd35c6d-91f3-4a12-97b5-67c6412060f0" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_edd35c6d-91f3-4a12-97b5-67c6412060f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_edd35c6d-91f3-4a12-97b5-67c6412060f0" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_3267e5f7-1241-4cdd-9333-8e6924baf708" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_3267e5f7-1241-4cdd-9333-8e6924baf708" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_838e8dbe-3b77-4e33-8d26-e104db16c55e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_838e8dbe-3b77-4e33-8d26-e104db16c55e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_9f71fae7-b9bd-43d1-8fe4-40998161dcb9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_9f71fae7-b9bd-43d1-8fe4-40998161dcb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_df22c112-a3f1-4301-89bb-b410af1974ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_df22c112-a3f1-4301-89bb-b410af1974ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_8d80e375-bd50-4c84-8922-bbfafb5be252" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_8d80e375-bd50-4c84-8922-bbfafb5be252" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_820723aa-13e9-4879-9683-73302aacdfae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_820723aa-13e9-4879-9683-73302aacdfae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_9694b6fe-00e7-455c-8b0d-de4b0615e3db" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_9694b6fe-00e7-455c-8b0d-de4b0615e3db" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_ea13e4e5-5a0a-4afa-85bb-a4177b8cef85" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4b10102d-2dba-4d1e-a1fc-c490ad8970fb" xlink:to="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_ea13e4e5-5a0a-4afa-85bb-a4177b8cef85" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_15f8b621-5cc6-4594-9ba3-8eef6848852a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_15f8b621-5cc6-4594-9ba3-8eef6848852a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_0a3a7ef7-8df7-4329-b7b1-dc3935e7c922" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_0a3a7ef7-8df7-4329-b7b1-dc3935e7c922" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_1c9a0e7b-33e8-421f-9b78-d440ca310b12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_1c9a0e7b-33e8-421f-9b78-d440ca310b12" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_a0fffd6e-c960-45de-9768-24b369d7a9c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_a0fffd6e-c960-45de-9768-24b369d7a9c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_e7e4b67b-ff52-4502-8568-fe7b7a272b92" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_e7e4b67b-ff52-4502-8568-fe7b7a272b92" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0697795f-aaef-4f92-b054-13a35f0530f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a32f966a-f22e-4cdf-9220-ae01b1633583" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0697795f-aaef-4f92-b054-13a35f0530f0" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsNarrativeDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_e5295615-88bd-4070-9e22-3a8b40427b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_us-gaap_FinancialInstrumentAxis_e5295615-88bd-4070-9e22-3a8b40427b6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5295615-88bd-4070-9e22-3a8b40427b6d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_e5295615-88bd-4070-9e22-3a8b40427b6d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5295615-88bd-4070-9e22-3a8b40427b6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_3abcda43-04e9-4ac0-85e6-c4a5bbacede5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_e5295615-88bd-4070-9e22-3a8b40427b6d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_3abcda43-04e9-4ac0-85e6-c4a5bbacede5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NonGovernmentBackedMember_805690de-9e43-4fdb-8c0e-0cf9f5a47fc7" xlink:href="pra-20240930.xsd#pra_NonGovernmentBackedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_3abcda43-04e9-4ac0-85e6-c4a5bbacede5" xlink:to="loc_pra_NonGovernmentBackedMember_805690de-9e43-4fdb-8c0e-0cf9f5a47fc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_2673533f-3222-4b79-8f0e-537a03179cf4" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_2673533f-3222-4b79-8f0e-537a03179cf4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_2673533f-3222-4b79-8f0e-537a03179cf4_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_2673533f-3222-4b79-8f0e-537a03179cf4" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_2673533f-3222-4b79-8f0e-537a03179cf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_26d39924-cb0c-4469-a5af-cde857754481" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_2673533f-3222-4b79-8f0e-537a03179cf4" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_26d39924-cb0c-4469-a5af-cde857754481" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_TaxCreditPartnershipsLessThan20OwnershipMember_4f2d89fc-aae9-4566-993b-a1ad68259867" xlink:href="pra-20240930.xsd#pra_TaxCreditPartnershipsLessThan20OwnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_26d39924-cb0c-4469-a5af-cde857754481" xlink:to="loc_pra_TaxCreditPartnershipsLessThan20OwnershipMember_4f2d89fc-aae9-4566-993b-a1ad68259867" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyGreaterThan25PercentOwnershipMember_8223d6ba-5d95-4d97-a6b7-0dde5c884689" xlink:href="pra-20240930.xsd#pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyGreaterThan25PercentOwnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_26d39924-cb0c-4469-a5af-cde857754481" xlink:to="loc_pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyGreaterThan25PercentOwnershipMember_8223d6ba-5d95-4d97-a6b7-0dde5c884689" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyLessthan25PercentOwnershipMember_24821980-c537-4ad5-aaf0-3b9a894410bf" xlink:href="pra-20240930.xsd#pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyLessthan25PercentOwnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_26d39924-cb0c-4469-a5af-cde857754481" xlink:to="loc_pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyLessthan25PercentOwnershipMember_24821980-c537-4ad5-aaf0-3b9a894410bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_61c7618a-4a5a-485d-bed0-45c67fd2f0ab" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_srt_RangeAxis_61c7618a-4a5a-485d-bed0-45c67fd2f0ab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_61c7618a-4a5a-485d-bed0-45c67fd2f0ab_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_61c7618a-4a5a-485d-bed0-45c67fd2f0ab" xlink:to="loc_srt_RangeMember_61c7618a-4a5a-485d-bed0-45c67fd2f0ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1e0e7f82-4302-450e-bb5e-ff2050d45016" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_61c7618a-4a5a-485d-bed0-45c67fd2f0ab" xlink:to="loc_srt_RangeMember_1e0e7f82-4302-450e-bb5e-ff2050d45016" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_762185c1-6cfe-4097-afea-5625378c51dd" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1e0e7f82-4302-450e-bb5e-ff2050d45016" xlink:to="loc_srt_MaximumMember_762185c1-6cfe-4097-afea-5625378c51dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodAxis_dcd35a96-9315-40ef-9e0c-f3d99937b76d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_us-gaap_TaxPeriodAxis_dcd35a96-9315-40ef-9e0c-f3d99937b76d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_dcd35a96-9315-40ef-9e0c-f3d99937b76d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_dcd35a96-9315-40ef-9e0c-f3d99937b76d" xlink:to="loc_us-gaap_TaxPeriodDomain_dcd35a96-9315-40ef-9e0c-f3d99937b76d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_605382ed-b606-4fbc-b636-5376ec3bad10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_dcd35a96-9315-40ef-9e0c-f3d99937b76d" xlink:to="loc_us-gaap_TaxPeriodDomain_605382ed-b606-4fbc-b636-5376ec3bad10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxYear2019Member_1d128b59-ed42-4d17-9c27-6661f3b88ee0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxYear2019Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_605382ed-b606-4fbc-b636-5376ec3bad10" xlink:to="loc_us-gaap_TaxYear2019Member_1d128b59-ed42-4d17-9c27-6661f3b88ee0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis_36595584-deff-4ded-b146-9658b9882135" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PledgedStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_us-gaap_PledgedStatusAxis_36595584-deff-4ded-b146-9658b9882135" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_36595584-deff-4ded-b146-9658b9882135_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PledgedStatusAxis_36595584-deff-4ded-b146-9658b9882135" xlink:to="loc_us-gaap_PledgedStatusDomain_36595584-deff-4ded-b146-9658b9882135_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_4c1b897b-0800-4500-8578-ae9086d4f830" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PledgedStatusAxis_36595584-deff-4ded-b146-9658b9882135" xlink:to="loc_us-gaap_PledgedStatusDomain_4c1b897b-0800-4500-8578-ae9086d4f830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember_57f034cf-c570-4b36-9472-c74293448154" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PledgedStatusDomain_4c1b897b-0800-4500-8578-ae9086d4f830" xlink:to="loc_us-gaap_AssetPledgedAsCollateralMember_57f034cf-c570-4b36-9472-c74293448154" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9e7fe976-5feb-4492-9f1d-64f69b80c0b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9e7fe976-5feb-4492-9f1d-64f69b80c0b3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9e7fe976-5feb-4492-9f1d-64f69b80c0b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9e7fe976-5feb-4492-9f1d-64f69b80c0b3" xlink:to="loc_us-gaap_SegmentDomain_9e7fe976-5feb-4492-9f1d-64f69b80c0b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d6f98e29-2109-4197-b911-cceaecdddd23" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9e7fe976-5feb-4492-9f1d-64f69b80c0b3" xlink:to="loc_us-gaap_SegmentDomain_d6f98e29-2109-4197-b911-cceaecdddd23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LloydsSyndicatesMember_75ccac49-74ec-4f77-a74d-7901ecac201f" xlink:href="pra-20240930.xsd#pra_LloydsSyndicatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_d6f98e29-2109-4197-b911-cceaecdddd23" xlink:to="loc_pra_LloydsSyndicatesMember_75ccac49-74ec-4f77-a74d-7901ecac201f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_c5641f2a-53e4-4e87-a870-3ef72dd2a950" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_833051e1-1af1-4a43-819b-77692b5493f4" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_c5641f2a-53e4-4e87-a870-3ef72dd2a950" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_c5641f2a-53e4-4e87-a870-3ef72dd2a950_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_c5641f2a-53e4-4e87-a870-3ef72dd2a950" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_c5641f2a-53e4-4e87-a870-3ef72dd2a950_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_e1943076-966c-4445-b506-f3d1b964ef22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_c5641f2a-53e4-4e87-a870-3ef72dd2a950" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_e1943076-966c-4445-b506-f3d1b964ef22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_TaxCreditPartnershipInvestmentTaxCreditCarryforwardMember_e9577aab-07ba-4e2d-b892-d45af57585d4" xlink:href="pra-20240930.xsd#pra_TaxCreditPartnershipInvestmentTaxCreditCarryforwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_e1943076-966c-4445-b506-f3d1b964ef22" xlink:to="loc_pra_TaxCreditPartnershipInvestmentTaxCreditCarryforwardMember_e9577aab-07ba-4e2d-b892-d45af57585d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberOfInvestmentAffiliatesExceedingShareholdersEquityTenPercentThresholdLimit_541be7f3-7789-4ea0-914b-7ee2adb3528d" xlink:href="pra-20240930.xsd#pra_NumberOfInvestmentAffiliatesExceedingShareholdersEquityTenPercentThresholdLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_NumberOfInvestmentAffiliatesExceedingShareholdersEquityTenPercentThresholdLimit_541be7f3-7789-4ea0-914b-7ee2adb3528d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ThresholdLimitOfInvestmentsBasedOnShareholdersEquity_fbf06522-dae9-4ef9-b048-1573cddd5c62" xlink:href="pra-20240930.xsd#pra_ThresholdLimitOfInvestmentsBasedOnShareholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_ThresholdLimitOfInvestmentsBasedOnShareholdersEquity_fbf06522-dae9-4ef9-b048-1573cddd5c62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldByInsuranceRegulators_e8859353-051d-42ca-994d-63cac964d740" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsHeldByInsuranceRegulators"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_us-gaap_AssetsHeldByInsuranceRegulators_e8859353-051d-42ca-994d-63cac964d740" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositAssets_32d55733-acb2-412f-a301-747f9e1bca13" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepositAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_us-gaap_DepositAssets_32d55733-acb2-412f-a301-747f9e1bca13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SyndicateCreditAgreementSettlementReceived_1e787887-f582-4e81-950c-9d62cd36d85d" xlink:href="pra-20240930.xsd#pra_SyndicateCreditAgreementSettlementReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_SyndicateCreditAgreementSettlementReceived_1e787887-f582-4e81-950c-9d62cd36d85d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_9dfc0a09-9a3e-4712-b317-befbb3a87ca5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_9dfc0a09-9a3e-4712-b317-befbb3a87ca5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberOfDebtSecuritiesInUnrealizedLossPositionAsPercentageOfDebtSecurities_5d31e8fe-795f-454f-a2fb-9b4db6fd23cc" xlink:href="pra-20240930.xsd#pra_NumberOfDebtSecuritiesInUnrealizedLossPositionAsPercentageOfDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_NumberOfDebtSecuritiesInUnrealizedLossPositionAsPercentageOfDebtSecurities_5d31e8fe-795f-454f-a2fb-9b4db6fd23cc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_AvailableForSaleSecuritiesInUnrealizedLossPositionsNumberOfIssuers_7bcc2623-5db0-4e49-9679-d5a000731e43" xlink:href="pra-20240930.xsd#pra_AvailableForSaleSecuritiesInUnrealizedLossPositionsNumberOfIssuers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_AvailableForSaleSecuritiesInUnrealizedLossPositionsNumberOfIssuers_7bcc2623-5db0-4e49-9679-d5a000731e43" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SingleGreatestUnrealizedLossPosition_a38f869f-33f6-44f7-92f9-cf42ad74c9f9" xlink:href="pra-20240930.xsd#pra_SingleGreatestUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_SingleGreatestUnrealizedLossPosition_a38f869f-33f6-44f7-92f9-cf42ad74c9f9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SecondGreatestUnrealizedLossPosition_1882f37a-0638-4272-a04f-ece804f25804" xlink:href="pra-20240930.xsd#pra_SecondGreatestUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_SecondGreatestUnrealizedLossPosition_1882f37a-0638-4272-a04f-ece804f25804" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentInUnconsolidatedSubsidiariesOwnershipPercentage_36bc573c-9c21-4316-b02f-6186aa1c2018" xlink:href="pra-20240930.xsd#pra_InvestmentInUnconsolidatedSubsidiariesOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_InvestmentInUnconsolidatedSubsidiariesOwnershipPercentage_36bc573c-9c21-4316-b02f-6186aa1c2018" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NumberofLPsLLCswithEquityMethodInvestmentOwnershipPercentageOver25percent_d487a1a1-3a83-4dc2-a405-28af0ba5d5e9" xlink:href="pra-20240930.xsd#pra_NumberofLPsLLCswithEquityMethodInvestmentOwnershipPercentageOver25percent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_NumberofLPsLLCswithEquityMethodInvestmentOwnershipPercentageOver25percent_d487a1a1-3a83-4dc2-a405-28af0ba5d5e9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentInUnconsolidatedSubsidiaries_8dc830cd-efef-49a6-92c6-48b7d826b08e" xlink:href="pra-20240930.xsd#pra_InvestmentInUnconsolidatedSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_InvestmentInUnconsolidatedSubsidiaries_8dc830cd-efef-49a6-92c6-48b7d826b08e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_DeferredIncomeTaxCredits_b86640e6-3fa2-4034-a9ef-76525f02a627" xlink:href="pra-20240930.xsd#pra_DeferredIncomeTaxCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_DeferredIncomeTaxCredits_b86640e6-3fa2-4034-a9ef-76525f02a627" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_5142db1c-b366-495f-be9a-f92f6810fd0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_5142db1c-b366-495f-be9a-f92f6810fd0d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossDebtSecuritiesPortionRecognizedinEarnings_9c694efd-e822-4704-808b-c8fe72832639" xlink:href="pra-20240930.xsd#pra_ImpairmentLossDebtSecuritiesPortionRecognizedinEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_ImpairmentLossDebtSecuritiesPortionRecognizedinEarnings_9c694efd-e822-4704-808b-c8fe72832639" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossDebtSecuritiesPortionRecognizedInEarningsExcludingNonCreditPortion_6b8dd1aa-c55c-47b8-afdf-095005a437fd" xlink:href="pra-20240930.xsd#pra_ImpairmentLossDebtSecuritiesPortionRecognizedInEarningsExcludingNonCreditPortion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_ImpairmentLossDebtSecuritiesPortionRecognizedInEarningsExcludingNonCreditPortion_6b8dd1aa-c55c-47b8-afdf-095005a437fd" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossesInvestmentsPortionInOtherComprehensiveLossBeforeTaxPortionAttributableToParent_b3156295-3bfc-4e0b-ab05-b42eb4167886" xlink:href="pra-20240930.xsd#pra_ImpairmentLossesInvestmentsPortionInOtherComprehensiveLossBeforeTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_ImpairmentLossesInvestmentsPortionInOtherComprehensiveLossBeforeTaxPortionAttributableToParent_b3156295-3bfc-4e0b-ab05-b42eb4167886" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossDebtSecuritiesNumberOfCorporateBonds_b477508f-7c04-43c9-9f75-d6efff9816c9" xlink:href="pra-20240930.xsd#pra_ImpairmentLossDebtSecuritiesNumberOfCorporateBonds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_148ba578-1207-4735-a79f-090ba28aaa10" xlink:to="loc_pra_ImpairmentLossDebtSecuritiesNumberOfCorporateBonds_b477508f-7c04-43c9-9f75-d6efff9816c9" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsInvestmentsHeldinaLossPositionDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsInvestmentsHeldinaLossPositionDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsInvestmentsHeldinaLossPositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60a3b27e-3213-4d8e-b331-faa5d1fdd584" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_4ff27730-6f1a-4e0d-b46f-d2a8288873a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60a3b27e-3213-4d8e-b331-faa5d1fdd584" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_4ff27730-6f1a-4e0d-b46f-d2a8288873a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_a6c88e82-be5e-4418-b2b2-b5f12a2cb1aa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_4ff27730-6f1a-4e0d-b46f-d2a8288873a5" xlink:to="loc_us-gaap_FinancialInstrumentAxis_a6c88e82-be5e-4418-b2b2-b5f12a2cb1aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a6c88e82-be5e-4418-b2b2-b5f12a2cb1aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_a6c88e82-be5e-4418-b2b2-b5f12a2cb1aa" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a6c88e82-be5e-4418-b2b2-b5f12a2cb1aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_a6c88e82-be5e-4418-b2b2-b5f12a2cb1aa" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_a4f4b693-9ddb-4268-aedb-454e3d112639" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_a4f4b693-9ddb-4268-aedb-454e3d112639" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_d0c6251d-ab15-4c3b-897c-2ee4a298e7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember_d0c6251d-ab15-4c3b-897c-2ee4a298e7eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_27417e2b-b280-4f62-a4b5-86c3f4ebb2a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_27417e2b-b280-4f62-a4b5-86c3f4ebb2a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_33622a6f-1aa2-43e6-b66b-b122f9e246ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_33622a6f-1aa2-43e6-b66b-b122f9e246ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_b481a236-b234-4895-b83a-0f8fd15574c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_b481a236-b234-4895-b83a-0f8fd15574c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_ff9e7ab1-5fd4-4e90-b522-88755088b7be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_ff9e7ab1-5fd4-4e90-b522-88755088b7be" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_afc2c437-be77-46e6-8f00-54c34f27acd0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_afc2c437-be77-46e6-8f00-54c34f27acd0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_a741e117-7e6f-4eeb-ab1d-062118d68d4d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4f0dfc72-29fd-48df-8134-4be1aefd16c7" xlink:to="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_a741e117-7e6f-4eeb-ab1d-062118d68d4d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentsContinuousUnrealizedLossPositionAbstract_da8a2205-1709-4a6a-9f8b-b5a290fb93de" xlink:href="pra-20240930.xsd#pra_InvestmentsContinuousUnrealizedLossPositionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60a3b27e-3213-4d8e-b331-faa5d1fdd584" xlink:to="loc_pra_InvestmentsContinuousUnrealizedLossPositionAbstract_da8a2205-1709-4a6a-9f8b-b5a290fb93de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_71cf5929-8583-4d2c-8ab8-d1a447b864bd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_InvestmentsContinuousUnrealizedLossPositionAbstract_da8a2205-1709-4a6a-9f8b-b5a290fb93de" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_71cf5929-8583-4d2c-8ab8-d1a447b864bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_faa1ba44-1a31-4e2a-a40a-2162c956652d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_InvestmentsContinuousUnrealizedLossPositionAbstract_da8a2205-1709-4a6a-9f8b-b5a290fb93de" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_faa1ba44-1a31-4e2a-a40a-2162c956652d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_08713826-4e6e-4274-b28f-017b639a2738" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_InvestmentsContinuousUnrealizedLossPositionAbstract_da8a2205-1709-4a6a-9f8b-b5a290fb93de" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_08713826-4e6e-4274-b28f-017b639a2738" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_8f716e05-97e0-47a4-a8e1-26b52dc395cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_60a3b27e-3213-4d8e-b331-faa5d1fdd584" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_8f716e05-97e0-47a4-a8e1-26b52dc395cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_6d4d2029-a256-46ac-8c77-ee6cb5fd3f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_8f716e05-97e0-47a4-a8e1-26b52dc395cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_6d4d2029-a256-46ac-8c77-ee6cb5fd3f2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_4e2dd404-6e66-4948-9a18-f5e8f93d21c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_8f716e05-97e0-47a4-a8e1-26b52dc395cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_4e2dd404-6e66-4948-9a18-f5e8f93d21c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_ecaa56e1-9239-4235-80da-adba9027857f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_8f716e05-97e0-47a4-a8e1-26b52dc395cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_ecaa56e1-9239-4235-80da-adba9027857f" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsCreditLossesRelatedtoDebtSecuritiesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsCreditLossesRelatedtoDebtSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsCreditLossesRelatedtoDebtSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems_609a343b-cf04-437b-aae3-e4e4a98d8662" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTable_233c988d-1405-40a4-85f8-b92ae9f04053" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems_609a343b-cf04-437b-aae3-e4e4a98d8662" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTable_233c988d-1405-40a4-85f8-b92ae9f04053" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_43dcbbe2-1d78-4730-84b3-d66e45825906" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTable_233c988d-1405-40a4-85f8-b92ae9f04053" xlink:to="loc_us-gaap_FinancialInstrumentAxis_43dcbbe2-1d78-4730-84b3-d66e45825906" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_43dcbbe2-1d78-4730-84b3-d66e45825906_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_43dcbbe2-1d78-4730-84b3-d66e45825906" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_43dcbbe2-1d78-4730-84b3-d66e45825906_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6e4cf19c-3199-44a4-a6e4-86721724ac74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_43dcbbe2-1d78-4730-84b3-d66e45825906" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6e4cf19c-3199-44a4-a6e4-86721724ac74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_dbfd36aa-4fe0-42b2-bd6b-5271b9329b02" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6e4cf19c-3199-44a4-a6e4-86721724ac74" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_dbfd36aa-4fe0-42b2-bd6b-5271b9329b02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_46bb5322-a4c3-4593-9d56-66fa5f7d930a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6e4cf19c-3199-44a4-a6e4-86721724ac74" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_46bb5322-a4c3-4593-9d56-66fa5f7d930a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherCommercialMortgageBackedSecuritiesMember_8adb104e-f277-41bb-b93b-879f73f5bfda" xlink:href="pra-20240930.xsd#pra_OtherCommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6e4cf19c-3199-44a4-a6e4-86721724ac74" xlink:to="loc_pra_OtherCommercialMortgageBackedSecuritiesMember_8adb104e-f277-41bb-b93b-879f73f5bfda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherAssetBackedSecuritiesMember_99f8d595-e53b-4998-81b7-02cc6d1d5ae3" xlink:href="pra-20240930.xsd#pra_OtherAssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6e4cf19c-3199-44a4-a6e4-86721724ac74" xlink:to="loc_pra_OtherAssetBackedSecuritiesMember_99f8d595-e53b-4998-81b7-02cc6d1d5ae3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward_3b342025-b0af-41d5-b044-4cf605a2f3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems_609a343b-cf04-437b-aae3-e4e4a98d8662" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward_3b342025-b0af-41d5-b044-4cf605a2f3eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_c99abc0f-2464-42f2-99bf-cbd43fa7d5bd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward_3b342025-b0af-41d5-b044-4cf605a2f3eb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_c99abc0f-2464-42f2-99bf-cbd43fa7d5bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded_0a782506-d08b-4b63-a255-ecd464c08c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward_3b342025-b0af-41d5-b044-4cf605a2f3eb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded_0a782506-d08b-4b63-a255-ecd464c08c4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal_2fb96d90-14f3-4bd8-a600-f5e97a2d6e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward_3b342025-b0af-41d5-b044-4cf605a2f3eb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal_2fb96d90-14f3-4bd8-a600-f5e97a2d6e1c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold_89080c0c-dd83-4e77-9a00-df4dc0cb17bd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossRollForward_3b342025-b0af-41d5-b044-4cf605a2f3eb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold_89080c0c-dd83-4e77-9a00-df4dc0cb17bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_09b95414-0f78-4dc5-89be-82ee126ab2a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsNetInvestmentIncomeDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsNetInvestmentIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsNetInvestmentIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5995576c-2dad-4efe-9d84-850ede52ddb9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_8a749045-a0f5-4067-aec1-e064068c5670" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5995576c-2dad-4efe-9d84-850ede52ddb9" xlink:to="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_8a749045-a0f5-4067-aec1-e064068c5670" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_b85fd763-d634-49e0-9e57-f78301701135" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_8a749045-a0f5-4067-aec1-e064068c5670" xlink:to="loc_us-gaap_InvestmentTypeAxis_b85fd763-d634-49e0-9e57-f78301701135" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_b85fd763-d634-49e0-9e57-f78301701135_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_b85fd763-d634-49e0-9e57-f78301701135" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_b85fd763-d634-49e0-9e57-f78301701135_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_3e005780-b332-4b67-a454-7b3794e1e8ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_b85fd763-d634-49e0-9e57-f78301701135" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_3e005780-b332-4b67-a454-7b3794e1e8ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesMember_e5593669-226a-4ba1-94cb-3d9977c0facf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_3e005780-b332-4b67-a454-7b3794e1e8ca" xlink:to="loc_us-gaap_DebtSecuritiesMember_e5593669-226a-4ba1-94cb-3d9977c0facf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_11d99a87-194e-41e1-a401-bbce98b348b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_3e005780-b332-4b67-a454-7b3794e1e8ca" xlink:to="loc_us-gaap_EquitySecuritiesMember_11d99a87-194e-41e1-a401-bbce98b348b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ShortTermInvestmentsAndOtherInvestedAssetsMember_6306bf8c-6140-4a05-949e-eab3c7d9459a" xlink:href="pra-20240930.xsd#pra_ShortTermInvestmentsAndOtherInvestedAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_3e005780-b332-4b67-a454-7b3794e1e8ca" xlink:to="loc_pra_ShortTermInvestmentsAndOtherInvestedAssetsMember_6306bf8c-6140-4a05-949e-eab3c7d9459a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashSurrenderValueMember_12b8055d-05eb-4fb4-930c-3c3d684e8a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashSurrenderValueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_3e005780-b332-4b67-a454-7b3794e1e8ca" xlink:to="loc_us-gaap_CashSurrenderValueMember_12b8055d-05eb-4fb4-930c-3c3d684e8a4e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncomeAbstract_f162b50b-8bbc-4b7e-9f95-2176e8820f6a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetInvestmentIncomeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5995576c-2dad-4efe-9d84-850ede52ddb9" xlink:to="loc_us-gaap_NetInvestmentIncomeAbstract_f162b50b-8bbc-4b7e-9f95-2176e8820f6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_1b360096-c245-444a-9889-c7c12418271b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetInvestmentIncomeAbstract_f162b50b-8bbc-4b7e-9f95-2176e8820f6a" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_1b360096-c245-444a-9889-c7c12418271b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentIncomeLossBankOwnedLifeInsurance_50e78d6b-7e60-44f4-a58c-cfa608944885" xlink:href="pra-20240930.xsd#pra_InvestmentIncomeLossBankOwnedLifeInsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetInvestmentIncomeAbstract_f162b50b-8bbc-4b7e-9f95-2176e8820f6a" xlink:to="loc_pra_InvestmentIncomeLossBankOwnedLifeInsurance_50e78d6b-7e60-44f4-a58c-cfa608944885" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_f9a5431b-7631-4d08-8c0e-2e56c681960b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetInvestmentIncomeAbstract_f162b50b-8bbc-4b7e-9f95-2176e8820f6a" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_f9a5431b-7631-4d08-8c0e-2e56c681960b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_22a2c4f8-c4e4-4021-8ed1-b1d1ba8c258b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetInvestmentIncomeAbstract_f162b50b-8bbc-4b7e-9f95-2176e8820f6a" xlink:to="loc_us-gaap_NetInvestmentIncome_22a2c4f8-c4e4-4021-8ed1-b1d1ba8c258b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsUnconsolidatedSubsidiariesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsUnconsolidatedSubsidiariesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsUnconsolidatedSubsidiariesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_755843dc-5541-46c6-8688-e09c7c853e8c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_bf1457ff-5b84-4f80-9e57-c812dd823fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_755843dc-5541-46c6-8688-e09c7c853e8c" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_bf1457ff-5b84-4f80-9e57-c812dd823fe8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_95a63bed-a346-4f24-8be6-8254032ba594" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_bf1457ff-5b84-4f80-9e57-c812dd823fe8" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_95a63bed-a346-4f24-8be6-8254032ba594" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_95a63bed-a346-4f24-8be6-8254032ba594_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_95a63bed-a346-4f24-8be6-8254032ba594" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_95a63bed-a346-4f24-8be6-8254032ba594_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_088a0848-9944-4c7e-8586-ab9255df10aa" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_95a63bed-a346-4f24-8be6-8254032ba594" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_088a0848-9944-4c7e-8586-ab9255df10aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_QualifiedAffordableHousingTaxCreditPartnershipsMember_0644327e-7da4-465e-b7a9-29fb731422ec" xlink:href="pra-20240930.xsd#pra_QualifiedAffordableHousingTaxCreditPartnershipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_088a0848-9944-4c7e-8586-ab9255df10aa" xlink:to="loc_pra_QualifiedAffordableHousingTaxCreditPartnershipsMember_0644327e-7da4-465e-b7a9-29fb731422ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyMember_d50895e3-b1cc-4fe0-ba50-715c5ba99825" xlink:href="pra-20240930.xsd#pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_088a0848-9944-4c7e-8586-ab9255df10aa" xlink:to="loc_pra_OtherLimitedPartnershipsandLimitedLiabilityCompanyMember_d50895e3-b1cc-4fe0-ba50-715c5ba99825" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_InvestmentInUnconsolidatedSubsidiaries_a94f11b4-e4f3-45fa-a53d-0c1b78cb652d" xlink:href="pra-20240930.xsd#pra_InvestmentInUnconsolidatedSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_755843dc-5541-46c6-8688-e09c7c853e8c" xlink:to="loc_pra_InvestmentInUnconsolidatedSubsidiaries_a94f11b4-e4f3-45fa-a53d-0c1b78cb652d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/InvestmentsNetRealizedInvestmentGainsLossesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#InvestmentsNetRealizedInvestmentGainsLossesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/InvestmentsNetRealizedInvestmentGainsLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_75bdb92d-c833-45c3-96d1-6e44746f1285" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_75bdb92d-c833-45c3-96d1-6e44746f1285" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_ea10eb55-8a71-4a2f-8567-a19f7a9691cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_75bdb92d-c833-45c3-96d1-6e44746f1285" xlink:to="loc_us-gaap_FinancialInstrumentAxis_ea10eb55-8a71-4a2f-8567-a19f7a9691cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ea10eb55-8a71-4a2f-8567-a19f7a9691cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_ea10eb55-8a71-4a2f-8567-a19f7a9691cd" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ea10eb55-8a71-4a2f-8567-a19f7a9691cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fa71e04f-5e58-42eb-bfdf-dc0fbf622feb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_ea10eb55-8a71-4a2f-8567-a19f7a9691cd" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fa71e04f-5e58-42eb-bfdf-dc0fbf622feb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_7523bad5-fd43-487a-85b0-59d699d59fc4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fa71e04f-5e58-42eb-bfdf-dc0fbf622feb" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_7523bad5-fd43-487a-85b0-59d699d59fc4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_4146ec12-1806-44f5-a71d-1b7af4f26204" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_fa71e04f-5e58-42eb-bfdf-dc0fbf622feb" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_4146ec12-1806-44f5-a71d-1b7af4f26204" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_35be8603-cd93-4c0f-ae25-b39b957f78ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_75bdb92d-c833-45c3-96d1-6e44746f1285" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_35be8603-cd93-4c0f-ae25-b39b957f78ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35be8603-cd93-4c0f-ae25-b39b957f78ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_35be8603-cd93-4c0f-ae25-b39b957f78ee" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_35be8603-cd93-4c0f-ae25-b39b957f78ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43e6c713-df83-4d2d-948f-a34ef2c1f240" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_35be8603-cd93-4c0f-ae25-b39b957f78ee" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43e6c713-df83-4d2d-948f-a34ef2c1f240" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NORCALGroupMember_ef5a0adc-2f5c-4ee7-b3e2-2a586ad0f8d2" xlink:href="pra-20240930.xsd#pra_NORCALGroupMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_43e6c713-df83-4d2d-948f-a34ef2c1f240" xlink:to="loc_pra_NORCALGroupMember_ef5a0adc-2f5c-4ee7-b3e2-2a586ad0f8d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossesInvestments_c092da43-4587-4ff6-8149-e0555ab7c7fb" xlink:href="pra-20240930.xsd#pra_ImpairmentLossesInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_pra_ImpairmentLossesInvestments_c092da43-4587-4ff6-8149-e0555ab7c7fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossesInvestmentsPortionInOtherComprehensiveLossBeforeTaxPortionAttributableToParent_db60fe17-16f6-499d-a97e-a6d1eb722bfd" xlink:href="pra-20240930.xsd#pra_ImpairmentLossesInvestmentsPortionInOtherComprehensiveLossBeforeTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_pra_ImpairmentLossesInvestmentsPortionInOtherComprehensiveLossBeforeTaxPortionAttributableToParent_db60fe17-16f6-499d-a97e-a6d1eb722bfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ImpairmentLossDebtSecuritiesPortionRecognizedinEarnings_2cbb8e96-14ab-4626-ac40-0b490e5b14ed" xlink:href="pra-20240930.xsd#pra_ImpairmentLossDebtSecuritiesPortionRecognizedinEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_pra_ImpairmentLossDebtSecuritiesPortionRecognizedinEarnings_2cbb8e96-14ab-4626-ac40-0b490e5b14ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_30949467-933c-461c-bcf6-067754ae8738" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_30949467-933c-461c-bcf6-067754ae8738" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_c8886753-19e9-4c1e-a116-c72a6601fcb1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_c8886753-19e9-4c1e-a116-c72a6601fcb1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingRealizedGainLoss_5fc0ae76-a023-4f53-bc37-ab518d9d7bba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesTradingRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_DebtSecuritiesTradingRealizedGainLoss_5fc0ae76-a023-4f53-bc37-ab518d9d7bba" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_7aa464f6-31eb-4479-8a59-5342dbf961cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesFvNiRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_7aa464f6-31eb-4479-8a59-5342dbf961cd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherInvestmentsRealizedGainLoss_1996a5bf-c229-4671-860d-fe5ff5a6afaf" xlink:href="pra-20240930.xsd#pra_OtherInvestmentsRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_pra_OtherInvestmentsRealizedGainLoss_1996a5bf-c229-4671-860d-fe5ff5a6afaf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingUnrealizedGainLoss_40a1a77d-0778-47e9-a93e-e9365b04c4fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtSecuritiesTradingUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_DebtSecuritiesTradingUnrealizedGainLoss_40a1a77d-0778-47e9-a93e-e9365b04c4fc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_6f8c4c74-a22c-43ef-9138-3e631ad7122c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_6f8c4c74-a22c-43ef-9138-3e631ad7122c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnHybridInstrumentNet_fc94e03c-e1d9-4c89-aa34-b6d957dd7ff6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnrealizedGainLossOnHybridInstrumentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_UnrealizedGainLossOnHybridInstrumentNet_fc94e03c-e1d9-4c89-aa34-b6d957dd7ff6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherInvestments_0486ff49-91e3-4c58-bdf7-74bdb8770aa4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainLossOnSaleOfOtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_GainLossOnSaleOfOtherInvestments_0486ff49-91e3-4c58-bdf7-74bdb8770aa4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_dd203394-753c-4fa5-a7cc-b46a5e880c7e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_GainLossOnInvestments_dd203394-753c-4fa5-a7cc-b46a5e880c7e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_c99fa3d7-774e-4db3-81f4-51f525e57f9d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_328f7def-bce2-4f81-88ce-dd662c916ebe" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1_c99fa3d7-774e-4db3-81f4-51f525e57f9d" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/IncomeTaxesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#IncomeTaxesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/IncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_b0a03fb3-0b26-461d-9460-90b7f5feab63" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxContingencyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_719c3c3a-40c6-4803-8aa3-76d842946965" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxContingencyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_b0a03fb3-0b26-461d-9460-90b7f5feab63" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_719c3c3a-40c6-4803-8aa3-76d842946965" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitAxis_7038fa9f-f3b3-4665-842f-c7081be8b390" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_719c3c3a-40c6-4803-8aa3-76d842946965" xlink:to="loc_us-gaap_ReportingUnitAxis_7038fa9f-f3b3-4665-842f-c7081be8b390" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_7038fa9f-f3b3-4665-842f-c7081be8b390_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReportingUnitAxis_7038fa9f-f3b3-4665-842f-c7081be8b390" xlink:to="loc_us-gaap_ReportingUnitDomain_7038fa9f-f3b3-4665-842f-c7081be8b390_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_4560b4dc-2014-4d12-b586-a496787749c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReportingUnitAxis_7038fa9f-f3b3-4665-842f-c7081be8b390" xlink:to="loc_us-gaap_ReportingUnitDomain_4560b4dc-2014-4d12-b586-a496787749c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_WorkersCompensationInsuranceReportingUnitMember_1b28851c-6622-4df1-ba68-f1f9aa11b4a7" xlink:href="pra-20240930.xsd#pra_WorkersCompensationInsuranceReportingUnitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_4560b4dc-2014-4d12-b586-a496787749c0" xlink:to="loc_pra_WorkersCompensationInsuranceReportingUnitMember_1b28851c-6622-4df1-ba68-f1f9aa11b4a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_91339308-ad36-4883-a3e4-04c9cb65aedf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_b0a03fb3-0b26-461d-9460-90b7f5feab63" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_91339308-ad36-4883-a3e4-04c9cb65aedf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_f0ac3ee9-2760-41a7-88d3-85f8cfef822f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_b0a03fb3-0b26-461d-9460-90b7f5feab63" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_f0ac3ee9-2760-41a7-88d3-85f8cfef822f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_2c8bce73-a4f3-4124-86d4-fd5ee0b5d1e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnrecognizedTaxBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_b0a03fb3-0b26-461d-9460-90b7f5feab63" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_2c8bce73-a4f3-4124-86d4-fd5ee0b5d1e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_b409fe7c-7cb7-483b-984d-2ee470aa80ef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_b0a03fb3-0b26-461d-9460-90b7f5feab63" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_b409fe7c-7cb7-483b-984d-2ee470aa80ef" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/GoodwillCarryingAmountofGoodwillDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#GoodwillCarryingAmountofGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/GoodwillCarryingAmountofGoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_14de6a08-4ba6-4639-95a0-f9b4a71904a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_3a4d751e-0181-4a63-80e3-f102c4a1a503" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_14de6a08-4ba6-4639-95a0-f9b4a71904a7" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_3a4d751e-0181-4a63-80e3-f102c4a1a503" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitAxis_59564a2e-ec12-41fa-a412-94ae3d8eb5e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_3a4d751e-0181-4a63-80e3-f102c4a1a503" xlink:to="loc_us-gaap_ReportingUnitAxis_59564a2e-ec12-41fa-a412-94ae3d8eb5e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_59564a2e-ec12-41fa-a412-94ae3d8eb5e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReportingUnitAxis_59564a2e-ec12-41fa-a412-94ae3d8eb5e8" xlink:to="loc_us-gaap_ReportingUnitDomain_59564a2e-ec12-41fa-a412-94ae3d8eb5e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_70463b70-eae1-4989-b129-9fd257c1d4de" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReportingUnitAxis_59564a2e-ec12-41fa-a412-94ae3d8eb5e8" xlink:to="loc_us-gaap_ReportingUnitDomain_70463b70-eae1-4989-b129-9fd257c1d4de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SpecialtyPropertyandCasualtyMember_d5d74256-b2ec-499e-85be-0921aada7c5c" xlink:href="pra-20240930.xsd#pra_SpecialtyPropertyandCasualtyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_70463b70-eae1-4989-b129-9fd257c1d4de" xlink:to="loc_pra_SpecialtyPropertyandCasualtyMember_d5d74256-b2ec-499e-85be-0921aada7c5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_WorkersCompensationInsuranceReportingUnitMember_8d148360-96f1-4efd-86f3-bb890a0b8b95" xlink:href="pra-20240930.xsd#pra_WorkersCompensationInsuranceReportingUnitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_70463b70-eae1-4989-b129-9fd257c1d4de" xlink:to="loc_pra_WorkersCompensationInsuranceReportingUnitMember_8d148360-96f1-4efd-86f3-bb890a0b8b95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SegregatedPortfolioCellReinsuranceMember_e7a70049-fab0-4c90-97d2-8d150b0b4fc8" xlink:href="pra-20240930.xsd#pra_SegregatedPortfolioCellReinsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_70463b70-eae1-4989-b129-9fd257c1d4de" xlink:to="loc_pra_SegregatedPortfolioCellReinsuranceMember_e7a70049-fab0-4c90-97d2-8d150b0b4fc8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_fc35992f-9058-42d6-b306-c747a6fef81d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_14de6a08-4ba6-4639-95a0-f9b4a71904a7" xlink:to="loc_us-gaap_GoodwillGross_fc35992f-9058-42d6-b306-c747a6fef81d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_f78a09fb-16c8-47b6-bb88-9e565ad24216" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_14de6a08-4ba6-4639-95a0-f9b4a71904a7" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_f78a09fb-16c8-47b6-bb88-9e565ad24216" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_b5d04bed-fd6c-41bf-9926-805db1af34fa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_14de6a08-4ba6-4639-95a0-f9b4a71904a7" xlink:to="loc_us-gaap_GoodwillRollForward_b5d04bed-fd6c-41bf-9926-805db1af34fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_44066b33-8c1f-4eb2-a9d6-11a2df1fa2ac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_b5d04bed-fd6c-41bf-9926-805db1af34fa" xlink:to="loc_us-gaap_Goodwill_44066b33-8c1f-4eb2-a9d6-11a2df1fa2ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_3fe89c49-ce50-4a0d-8e2a-258b4f055788" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_b5d04bed-fd6c-41bf-9926-805db1af34fa" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_3fe89c49-ce50-4a0d-8e2a-258b4f055788" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_b98b08b0-7c30-4881-81d9-2093027ff136" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/ReserveforLossesandLossAdjustmentExpensesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#ReserveforLossesandLossAdjustmentExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/ReserveforLossesandLossAdjustmentExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_cce4798c-014e-4504-a1af-37abd29182e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_cce4798c-014e-4504-a1af-37abd29182e0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1d14aacd-3b83-43d9-8b9f-9f515cbacc7a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_cce4798c-014e-4504-a1af-37abd29182e0" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1d14aacd-3b83-43d9-8b9f-9f515cbacc7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1d14aacd-3b83-43d9-8b9f-9f515cbacc7a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1d14aacd-3b83-43d9-8b9f-9f515cbacc7a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1d14aacd-3b83-43d9-8b9f-9f515cbacc7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1ab9d9e8-a440-474d-a00e-f2b61401e363" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1d14aacd-3b83-43d9-8b9f-9f515cbacc7a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1ab9d9e8-a440-474d-a00e-f2b61401e363" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NORCALGroupMember_0f2bec5c-59d7-480c-9544-a1d68e450c98" xlink:href="pra-20240930.xsd#pra_NORCALGroupMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1ab9d9e8-a440-474d-a00e-f2b61401e363" xlink:to="loc_pra_NORCALGroupMember_0f2bec5c-59d7-480c-9544-a1d68e450c98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_bb3b814d-2e6f-46e6-8d13-28b497900a23" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_cce4798c-014e-4504-a1af-37abd29182e0" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_bb3b814d-2e6f-46e6-8d13-28b497900a23" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_bb3b814d-2e6f-46e6-8d13-28b497900a23_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_bb3b814d-2e6f-46e6-8d13-28b497900a23" xlink:to="loc_us-gaap_SegmentDomain_bb3b814d-2e6f-46e6-8d13-28b497900a23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0c18f68f-7659-410c-9449-36fd45d5e348" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_bb3b814d-2e6f-46e6-8d13-28b497900a23" xlink:to="loc_us-gaap_SegmentDomain_0c18f68f-7659-410c-9449-36fd45d5e348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SpecialtyPropertyandCasualtyMember_1d716acf-252b-4922-b777-739f5e87c509" xlink:href="pra-20240930.xsd#pra_SpecialtyPropertyandCasualtyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0c18f68f-7659-410c-9449-36fd45d5e348" xlink:to="loc_pra_SpecialtyPropertyandCasualtyMember_1d716acf-252b-4922-b777-739f5e87c509" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_PortfolioCellReinsuranceMember_495870fe-eb0d-44b1-bb6f-458def0a85af" xlink:href="pra-20240930.xsd#pra_PortfolioCellReinsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0c18f68f-7659-410c-9449-36fd45d5e348" xlink:to="loc_pra_PortfolioCellReinsuranceMember_495870fe-eb0d-44b1-bb6f-458def0a85af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_MinimumPeriodForClaimsResolution_f04bc181-c39c-4ae6-a9c3-74e034d15ce0" xlink:href="pra-20240930.xsd#pra_MinimumPeriodForClaimsResolution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_pra_MinimumPeriodForClaimsResolution_f04bc181-c39c-4ae6-a9c3-74e034d15ce0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:href="pra-20240930.xsd#pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_1ccab577-95b1-4ce0-a24b-8ffad5ed42ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_1ccab577-95b1-4ce0-a24b-8ffad5ed42ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_8bb77e02-c81c-4353-a309-24755bacc6a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:to="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_8bb77e02-c81c-4353-a309-24755bacc6a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_eff1a25a-364e-4084-9ac3-cfc2d682375e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_eff1a25a-364e-4084-9ac3-cfc2d682375e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_0c9af833-a77d-4ee0-81d8-d1637b497acb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_0c9af833-a77d-4ee0-81d8-d1637b497acb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_e22ef9f4-7542-45d6-91d2-7e5a8da80866" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_0c9af833-a77d-4ee0-81d8-d1637b497acb" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_e22ef9f4-7542-45d6-91d2-7e5a8da80866" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_0204eae7-d223-436b-b19b-258cd2232085" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_0c9af833-a77d-4ee0-81d8-d1637b497acb" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_0204eae7-d223-436b-b19b-258cd2232085" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_fee7ca28-0cfa-4590-8c59-ff5cc404a4eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_0c9af833-a77d-4ee0-81d8-d1637b497acb" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_fee7ca28-0cfa-4590-8c59-ff5cc404a4eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_0f6dd77c-7fda-4191-a6a2-38f19ed3ef57" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_pra_LiabilityForClaimsAndClaimsAdjustmentExpenseRollForward_224a6f55-8a1f-4897-8217-adc19530834b" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_0f6dd77c-7fda-4191-a6a2-38f19ed3ef57" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_14d86839-82dc-4343-a47b-1ac56e1098ac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_0f6dd77c-7fda-4191-a6a2-38f19ed3ef57" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_14d86839-82dc-4343-a47b-1ac56e1098ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_64dbe217-48c8-4639-b5c6-9b6bcdb6f757" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_0f6dd77c-7fda-4191-a6a2-38f19ed3ef57" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_64dbe217-48c8-4639-b5c6-9b6bcdb6f757" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_029bec3a-caa6-4350-9ae7-c0c3fc4a69ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_0f6dd77c-7fda-4191-a6a2-38f19ed3ef57" xlink:to="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_029bec3a-caa6-4350-9ae7-c0c3fc4a69ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_cf660f85-b8e3-465e-9720-ec8f37d38f6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_b68dd668-bbe2-4eeb-8631-36a3384c83a4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_d05801c3-af2f-4b27-a606-d364221c4055" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NetUnfavorableDevelopmentMedicalProfessionalLiabilityBusiness_a8d534b2-d7bb-4c30-ba9c-dcc71b8885a1" xlink:href="pra-20240930.xsd#pra_NetUnfavorableDevelopmentMedicalProfessionalLiabilityBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_pra_NetUnfavorableDevelopmentMedicalProfessionalLiabilityBusiness_a8d534b2-d7bb-4c30-ba9c-dcc71b8885a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NetFavorablePriorYearReserveDevelopment_d464ebb9-4d7c-4896-b9ab-c899e51b7ade" xlink:href="pra-20240930.xsd#pra_NetFavorablePriorYearReserveDevelopment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_pra_NetFavorablePriorYearReserveDevelopment_d464ebb9-4d7c-4896-b9ab-c899e51b7ade" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NetFavorableDevelopmentInWorkersCompensationBusiness_e80f1ff0-e600-4443-af82-fcdd17017d8f" xlink:href="pra-20240930.xsd#pra_NetFavorableDevelopmentInWorkersCompensationBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_pra_NetFavorableDevelopmentInWorkersCompensationBusiness_e80f1ff0-e600-4443-af82-fcdd17017d8f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NetUnfavorableDevelopmentInWorkersCompensationBusiness_e7400dfd-eb9b-4100-964f-cec01878b8f3" xlink:href="pra-20240930.xsd#pra_NetUnfavorableDevelopmentInWorkersCompensationBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_dd5d475e-bb2b-4323-ab74-b54e7f846fc6" xlink:to="loc_pra_NetUnfavorableDevelopmentInWorkersCompensationBusiness_e7400dfd-eb9b-4100-964f-cec01878b8f3" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_afd94002-f04c-4788-9769-48d907a70dd8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_us-gaap_OtherCommitmentsTable_afd94002-f04c-4788-9769-48d907a70dd8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_f48fd0ea-bede-414b-b4d2-402dfa3cb549" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_afd94002-f04c-4788-9769-48d907a70dd8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_f48fd0ea-bede-414b-b4d2-402dfa3cb549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_f48fd0ea-bede-414b-b4d2-402dfa3cb549_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_f48fd0ea-bede-414b-b4d2-402dfa3cb549" xlink:to="loc_us-gaap_SegmentDomain_f48fd0ea-bede-414b-b4d2-402dfa3cb549_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7e0690e2-a939-4060-b29d-c9981ee910cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_f48fd0ea-bede-414b-b4d2-402dfa3cb549" xlink:to="loc_us-gaap_SegmentDomain_7e0690e2-a939-4060-b29d-c9981ee910cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LloydsSyndicatesMember_cc643b22-507e-4197-9ac3-575c57d3b98d" xlink:href="pra-20240930.xsd#pra_LloydsSyndicatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7e0690e2-a939-4060-b29d-c9981ee910cd" xlink:to="loc_pra_LloydsSyndicatesMember_cc643b22-507e-4197-9ac3-575c57d3b98d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAxis_2671bc5b-4df8-4b7a-952f-1f1969893451" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_afd94002-f04c-4788-9769-48d907a70dd8" xlink:to="loc_us-gaap_OtherCommitmentsAxis_2671bc5b-4df8-4b7a-952f-1f1969893451" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_2671bc5b-4df8-4b7a-952f-1f1969893451_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_2671bc5b-4df8-4b7a-952f-1f1969893451" xlink:to="loc_us-gaap_OtherCommitmentsDomain_2671bc5b-4df8-4b7a-952f-1f1969893451_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_6bba31aa-1169-4569-b059-794e9becf187" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_2671bc5b-4df8-4b7a-952f-1f1969893451" xlink:to="loc_us-gaap_OtherCommitmentsDomain_6bba31aa-1169-4569-b059-794e9becf187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_FundingCommitmentsMember_99a9d22d-5d0b-4012-94e1-fadf6ea600df" xlink:href="pra-20240930.xsd#pra_FundingCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_6bba31aa-1169-4569-b059-794e9becf187" xlink:to="loc_pra_FundingCommitmentsMember_99a9d22d-5d0b-4012-94e1-fadf6ea600df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_b05d1c3e-1340-4be4-a384-20a8eb5157e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_afd94002-f04c-4788-9769-48d907a70dd8" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_b05d1c3e-1340-4be4-a384-20a8eb5157e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b05d1c3e-1340-4be4-a384-20a8eb5157e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b05d1c3e-1340-4be4-a384-20a8eb5157e3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b05d1c3e-1340-4be4-a384-20a8eb5157e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0dfecc64-7954-46fe-861d-309eb56a5249" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b05d1c3e-1340-4be4-a384-20a8eb5157e3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0dfecc64-7954-46fe-861d-309eb56a5249" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NORCALGroupMember_ec36b64f-bac0-4253-8b56-cb70cf606547" xlink:href="pra-20240930.xsd#pra_NORCALGroupMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0dfecc64-7954-46fe-861d-309eb56a5249" xlink:to="loc_pra_NORCALGroupMember_ec36b64f-bac0-4253-8b56-cb70cf606547" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositAssets_8dbf04e2-fe01-46b5-a31e-c9bdf7cce047" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepositAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_us-gaap_DepositAssets_8dbf04e2-fe01-46b5-a31e-c9bdf7cce047" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SyndicateCreditAgreementSettlementReceived_1270dc84-a75f-4b77-b534-12849a43469e" xlink:href="pra-20240930.xsd#pra_SyndicateCreditAgreementSettlementReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_pra_SyndicateCreditAgreementSettlementReceived_1270dc84-a75f-4b77-b534-12849a43469e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SyndicateCreditAgreementAdvanceFundsPeriod_7b6bcab2-1bc1-4774-89f0-9c63f9cdf38c" xlink:href="pra-20240930.xsd#pra_SyndicateCreditAgreementAdvanceFundsPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_pra_SyndicateCreditAgreementAdvanceFundsPeriod_7b6bcab2-1bc1-4774-89f0-9c63f9cdf38c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_9c35ae3c-9af2-4ddd-9868-3f422eacf35f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_us-gaap_OtherCommitment_9c35ae3c-9af2-4ddd-9868-3f422eacf35f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_3432f1a6-3820-46b2-ac98-0a0fadbee3b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_3432f1a6-3820-46b2-ac98-0a0fadbee3b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_711f4250-739c-4a0b-b82d-601ca41cc6dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_eca94722-1e4a-4e59-a973-dc9563d09393" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_711f4250-739c-4a0b-b82d-601ca41cc6dd" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/DebtDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#DebtDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/DebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_0467c45b-5e6b-4f86-8405-80ab12f32e2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_us-gaap_DebtInstrumentTable_0467c45b-5e6b-4f86-8405-80ab12f32e2a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_cc001c9a-1c53-4685-b8ce-74bb552d8b2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0467c45b-5e6b-4f86-8405-80ab12f32e2a" xlink:to="loc_us-gaap_DebtInstrumentAxis_cc001c9a-1c53-4685-b8ce-74bb552d8b2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_cc001c9a-1c53-4685-b8ce-74bb552d8b2a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_cc001c9a-1c53-4685-b8ce-74bb552d8b2a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_cc001c9a-1c53-4685-b8ce-74bb552d8b2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8bc58e74-42c6-4b7b-96fe-d438814459c5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_cc001c9a-1c53-4685-b8ce-74bb552d8b2a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8bc58e74-42c6-4b7b-96fe-d438814459c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_ContributionCertificateDue2031Member_4920c37b-1c1d-45e5-9e48-d0869dab1816" xlink:href="pra-20240930.xsd#pra_ContributionCertificateDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8bc58e74-42c6-4b7b-96fe-d438814459c5" xlink:to="loc_pra_ContributionCertificateDue2031Member_4920c37b-1c1d-45e5-9e48-d0869dab1816" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_9974b488-a3f5-47f1-a9b5-fac65ce14a6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8bc58e74-42c6-4b7b-96fe-d438814459c5" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_9974b488-a3f5-47f1-a9b5-fac65ce14a6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_TermLoanMember_507927f1-6324-4b16-89a5-dffa2390b9b1" xlink:href="pra-20240930.xsd#pra_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8bc58e74-42c6-4b7b-96fe-d438814459c5" xlink:to="loc_pra_TermLoanMember_507927f1-6324-4b16-89a5-dffa2390b9b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_3860316e-9c83-4446-a224-78203a720c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0467c45b-5e6b-4f86-8405-80ab12f32e2a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_3860316e-9c83-4446-a224-78203a720c1a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3860316e-9c83-4446-a224-78203a720c1a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3860316e-9c83-4446-a224-78203a720c1a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3860316e-9c83-4446-a224-78203a720c1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a0d08226-4e7a-42c3-99bb-ab7b7022842b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3860316e-9c83-4446-a224-78203a720c1a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a0d08226-4e7a-42c3-99bb-ab7b7022842b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_8fa0a847-df46-4630-8bd3-db195e4339fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a0d08226-4e7a-42c3-99bb-ab7b7022842b" xlink:to="loc_us-gaap_LineOfCreditMember_8fa0a847-df46-4630-8bd3-db195e4339fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_b99a3759-b5de-4f77-9553-7d767c9dadfe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0467c45b-5e6b-4f86-8405-80ab12f32e2a" xlink:to="loc_us-gaap_CreditFacilityAxis_b99a3759-b5de-4f77-9553-7d767c9dadfe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_b99a3759-b5de-4f77-9553-7d767c9dadfe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_b99a3759-b5de-4f77-9553-7d767c9dadfe" xlink:to="loc_us-gaap_CreditFacilityDomain_b99a3759-b5de-4f77-9553-7d767c9dadfe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_1df7917e-af33-4969-a167-a721dc68cd16" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_b99a3759-b5de-4f77-9553-7d767c9dadfe" xlink:to="loc_us-gaap_CreditFacilityDomain_1df7917e-af33-4969-a167-a721dc68cd16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_9f8358ea-96f6-4f39-954f-ac10d193fb9b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1df7917e-af33-4969-a167-a721dc68cd16" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_9f8358ea-96f6-4f39-954f-ac10d193fb9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_c55e578c-300e-484b-8883-97b273837548" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_c55e578c-300e-484b-8883-97b273837548" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_f6820f08-5c1e-4d33-9849-d3c5bf9772fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_f6820f08-5c1e-4d33-9849-d3c5bf9772fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_da0aade8-cbef-4ec2-a2e1-1d6e10a482f4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_da0aade8-cbef-4ec2-a2e1-1d6e10a482f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LineOfCreditFacilityMaximumBorrowingCapacityIncludingAccordionFeature_0100c12d-5cb1-4004-9e79-ac306b40d688" xlink:href="pra-20240930.xsd#pra_LineOfCreditFacilityMaximumBorrowingCapacityIncludingAccordionFeature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_pra_LineOfCreditFacilityMaximumBorrowingCapacityIncludingAccordionFeature_0100c12d-5cb1-4004-9e79-ac306b40d688" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LineofCreditFacilityMaximumBorrowingCapacityAccordionFeature_feba19a4-34b0-4451-804a-c77b68ff75e4" xlink:href="pra-20240930.xsd#pra_LineofCreditFacilityMaximumBorrowingCapacityAccordionFeature"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_pra_LineofCreditFacilityMaximumBorrowingCapacityAccordionFeature_feba19a4-34b0-4451-804a-c77b68ff75e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_28a8c22b-45ce-42ac-bb07-17f8f6153518" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_28a8c22b-45ce-42ac-bb07-17f8f6153518" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_149f8af2-2068-440c-8730-588d536abfb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_63f9f7ef-b4ce-4eb0-9b96-1a0409dc5225" xlink:to="loc_us-gaap_LongTermDebt_149f8af2-2068-440c-8730-588d536abfb2" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/DerivativesNarrativeDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#DerivativesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/DerivativesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_c245f08f-10b2-4118-8b89-e8af8044f5a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_DerivativeTable_c245f08f-10b2-4118-8b89-e8af8044f5a1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_e5659392-1e01-418f-a65c-1eb7621a4f84" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_c245f08f-10b2-4118-8b89-e8af8044f5a1" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_e5659392-1e01-418f-a65c-1eb7621a4f84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e5659392-1e01-418f-a65c-1eb7621a4f84_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e5659392-1e01-418f-a65c-1eb7621a4f84" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e5659392-1e01-418f-a65c-1eb7621a4f84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_9f685d4e-fcd8-49c7-8aa5-de668be63f61" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e5659392-1e01-418f-a65c-1eb7621a4f84" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_9f685d4e-fcd8-49c7-8aa5-de668be63f61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_af7c014c-7887-44d5-88d3-de6a1a3c582c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_9f685d4e-fcd8-49c7-8aa5-de668be63f61" xlink:to="loc_us-gaap_LineOfCreditMember_af7c014c-7887-44d5-88d3-de6a1a3c582c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f77e8c6f-6d51-4d0d-8ab2-51990e6b7e04" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_c245f08f-10b2-4118-8b89-e8af8044f5a1" xlink:to="loc_srt_RangeAxis_f77e8c6f-6d51-4d0d-8ab2-51990e6b7e04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f77e8c6f-6d51-4d0d-8ab2-51990e6b7e04_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_f77e8c6f-6d51-4d0d-8ab2-51990e6b7e04" xlink:to="loc_srt_RangeMember_f77e8c6f-6d51-4d0d-8ab2-51990e6b7e04_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_49351ec1-b592-4198-9278-8be4da12153a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_f77e8c6f-6d51-4d0d-8ab2-51990e6b7e04" xlink:to="loc_srt_RangeMember_49351ec1-b592-4198-9278-8be4da12153a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b2f4ac7b-f817-4d51-b1ae-2ec56588aa61" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_49351ec1-b592-4198-9278-8be4da12153a" xlink:to="loc_srt_MinimumMember_b2f4ac7b-f817-4d51-b1ae-2ec56588aa61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_22919aca-20e4-4fe3-97ae-0f03a4dbaca3" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_49351ec1-b592-4198-9278-8be4da12153a" xlink:to="loc_srt_MaximumMember_22919aca-20e4-4fe3-97ae-0f03a4dbaca3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_2241b018-89cd-4d02-9d75-c01ad94b7791" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_c245f08f-10b2-4118-8b89-e8af8044f5a1" xlink:to="loc_us-gaap_DebtInstrumentAxis_2241b018-89cd-4d02-9d75-c01ad94b7791" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2241b018-89cd-4d02-9d75-c01ad94b7791_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2241b018-89cd-4d02-9d75-c01ad94b7791" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2241b018-89cd-4d02-9d75-c01ad94b7791_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_20858cb7-5844-4616-abff-6940d0fb128c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2241b018-89cd-4d02-9d75-c01ad94b7791" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_20858cb7-5844-4616-abff-6940d0fb128c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_RevolvingCreditAgreementMember_79f48cff-c8d3-47bb-a581-3ce437c4fa34" xlink:href="pra-20240930.xsd#pra_RevolvingCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_20858cb7-5844-4616-abff-6940d0fb128c" xlink:to="loc_pra_RevolvingCreditAgreementMember_79f48cff-c8d3-47bb-a581-3ce437c4fa34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_TermLoanMember_49cd5105-42bd-42f4-bb67-c2257ecb47fb" xlink:href="pra-20240930.xsd#pra_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_20858cb7-5844-4616-abff-6940d0fb128c" xlink:to="loc_pra_TermLoanMember_49cd5105-42bd-42f4-bb67-c2257ecb47fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_0064b45f-9298-4c7d-8068-1298caf593b1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_c245f08f-10b2-4118-8b89-e8af8044f5a1" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_0064b45f-9298-4c7d-8068-1298caf593b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_0064b45f-9298-4c7d-8068-1298caf593b1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_0064b45f-9298-4c7d-8068-1298caf593b1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_0064b45f-9298-4c7d-8068-1298caf593b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_a16a23e6-8f50-45a9-9c27-beaaae67abdc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_0064b45f-9298-4c7d-8068-1298caf593b1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_a16a23e6-8f50-45a9-9c27-beaaae67abdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_73f4351e-9ca7-4bae-9349-d7a1fadb09de" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_a16a23e6-8f50-45a9-9c27-beaaae67abdc" xlink:to="loc_us-gaap_InterestRateSwapMember_73f4351e-9ca7-4bae-9349-d7a1fadb09de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfInterestRateDerivativesHeld_2a5c2c13-d92c-4bea-bedd-35c7cc792600" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NumberOfInterestRateDerivativesHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_NumberOfInterestRateDerivativesHeld_2a5c2c13-d92c-4bea-bedd-35c7cc792600" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_97aed83e-d167-4bf1-9836-e2046b708296" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_DerivativeNotionalAmount_97aed83e-d167-4bf1-9836-e2046b708296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_de85f06a-0d74-43cc-84de-b1091cd0302f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_de85f06a-0d74-43cc-84de-b1091cd0302f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_e6cc506e-9f28-41f0-8a3b-71b53a3a1fe2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_e6cc506e-9f28-41f0-8a3b-71b53a3a1fe2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue_3456b47b-6787-4257-bf06-3fcf5365abc2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue_3456b47b-6787-4257-bf06-3fcf5365abc2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet_41bb1e41-db40-4cd6-8ca0-b43b9f4a2cb6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ed27f971-07bc-46ce-9e99-fb93226f3168" xlink:to="loc_us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet_41bb1e41-db40-4cd6-8ca0-b43b9f4a2cb6" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/DerivativesVolumeandFairValueDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#DerivativesVolumeandFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/DerivativesVolumeandFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_5c5b20de-5222-4bc4-a402-87d1fce0d14e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_9a46f55c-f34d-43ef-8c2d-d24481f69b22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_5c5b20de-5222-4bc4-a402-87d1fce0d14e" xlink:to="loc_us-gaap_DerivativeTable_9a46f55c-f34d-43ef-8c2d-d24481f69b22" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_74fb80e4-b4ff-4bda-9e95-a94c4c467233" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_9a46f55c-f34d-43ef-8c2d-d24481f69b22" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_74fb80e4-b4ff-4bda-9e95-a94c4c467233" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_74fb80e4-b4ff-4bda-9e95-a94c4c467233_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_74fb80e4-b4ff-4bda-9e95-a94c4c467233" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_74fb80e4-b4ff-4bda-9e95-a94c4c467233_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_67f24b97-2950-40f3-a262-3ac7ce65302b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_74fb80e4-b4ff-4bda-9e95-a94c4c467233" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_67f24b97-2950-40f3-a262-3ac7ce65302b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_9f8eabee-e1ec-41ee-b7ae-f6b15f4e4a89" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_67f24b97-2950-40f3-a262-3ac7ce65302b" xlink:to="loc_us-gaap_InterestRateSwapMember_9f8eabee-e1ec-41ee-b7ae-f6b15f4e4a89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0ec0a44b-d8b2-44dc-ae5f-f7ac20632163" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_9a46f55c-f34d-43ef-8c2d-d24481f69b22" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0ec0a44b-d8b2-44dc-ae5f-f7ac20632163" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_0ec0a44b-d8b2-44dc-ae5f-f7ac20632163_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0ec0a44b-d8b2-44dc-ae5f-f7ac20632163" xlink:to="loc_us-gaap_HedgingRelationshipDomain_0ec0a44b-d8b2-44dc-ae5f-f7ac20632163_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_508f97cf-92c4-44ae-9e95-945ef04022d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0ec0a44b-d8b2-44dc-ae5f-f7ac20632163" xlink:to="loc_us-gaap_HedgingRelationshipDomain_508f97cf-92c4-44ae-9e95-945ef04022d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_6fc853e6-c553-4871-a91a-626c1f967975" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_508f97cf-92c4-44ae-9e95-945ef04022d1" xlink:to="loc_us-gaap_CashFlowHedgingMember_6fc853e6-c553-4871-a91a-626c1f967975" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfInterestRateDerivativesHeld_809e52e5-fef1-4585-a16f-90be47cfd195" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NumberOfInterestRateDerivativesHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_5c5b20de-5222-4bc4-a402-87d1fce0d14e" xlink:to="loc_us-gaap_NumberOfInterestRateDerivativesHeld_809e52e5-fef1-4585-a16f-90be47cfd195" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotionalAmount_7f89e7c1-4b07-4cec-9bdf-75020ea3e42d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeAssetNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_5c5b20de-5222-4bc4-a402-87d1fce0d14e" xlink:to="loc_us-gaap_DerivativeAssetNotionalAmount_7f89e7c1-4b07-4cec-9bdf-75020ea3e42d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_5baebea7-615c-4717-bb56-0bc00cc74cbf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_5c5b20de-5222-4bc4-a402-87d1fce0d14e" xlink:to="loc_us-gaap_DerivativeAssets_5baebea7-615c-4717-bb56-0bc00cc74cbf" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/DerivativesDerivativeInstrumentsGainLossDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#DerivativesDerivativeInstrumentsGainLossDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/DerivativesDerivativeInstrumentsGainLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_2a89e029-4c5e-4f3c-9806-db9a10eb8ce1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_0090cdff-442f-4a76-8968-67ceb7cb8b03" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_2a89e029-4c5e-4f3c-9806-db9a10eb8ce1" xlink:to="loc_us-gaap_DerivativeTable_0090cdff-442f-4a76-8968-67ceb7cb8b03" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_736e96ef-7ddd-484d-96b9-961be87b4aae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_0090cdff-442f-4a76-8968-67ceb7cb8b03" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_736e96ef-7ddd-484d-96b9-961be87b4aae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_736e96ef-7ddd-484d-96b9-961be87b4aae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_736e96ef-7ddd-484d-96b9-961be87b4aae" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_736e96ef-7ddd-484d-96b9-961be87b4aae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_57d517f6-4337-4f7d-a735-e802fd94ee44" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_736e96ef-7ddd-484d-96b9-961be87b4aae" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_57d517f6-4337-4f7d-a735-e802fd94ee44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_bc40213a-fb75-4202-9767-cd72ccf1b8a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_57d517f6-4337-4f7d-a735-e802fd94ee44" xlink:to="loc_us-gaap_InterestRateSwapMember_bc40213a-fb75-4202-9767-cd72ccf1b8a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_d89ffd3a-2945-4ce7-b739-3313be6185cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_0090cdff-442f-4a76-8968-67ceb7cb8b03" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_d89ffd3a-2945-4ce7-b739-3313be6185cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d89ffd3a-2945-4ce7-b739-3313be6185cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d89ffd3a-2945-4ce7-b739-3313be6185cf" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d89ffd3a-2945-4ce7-b739-3313be6185cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_52f3ede1-354f-46a5-a5b0-88197db317a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d89ffd3a-2945-4ce7-b739-3313be6185cf" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_52f3ede1-354f-46a5-a5b0-88197db317a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_6c728a0a-ba57-4cb0-bc22-0621ad55c5d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_52f3ede1-354f-46a5-a5b0-88197db317a6" xlink:to="loc_us-gaap_InterestExpenseMember_6c728a0a-ba57-4cb0-bc22-0621ad55c5d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_875a040e-0fc1-4df7-b32e-eeb7dd32ee16" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_2a89e029-4c5e-4f3c-9806-db9a10eb8ce1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_875a040e-0fc1-4df7-b32e-eeb7dd32ee16" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/ShareholdersEquityRollForwardofAOCIDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#ShareholdersEquityRollForwardofAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/ShareholdersEquityRollForwardofAOCIDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_c99df15f-3aea-406e-903d-e99d718d4ba1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_102d72d6-4f49-40b3-a3de-172cc9e71a16" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_c99df15f-3aea-406e-903d-e99d718d4ba1" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_102d72d6-4f49-40b3-a3de-172cc9e71a16" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_6a740a3e-969a-4051-a27e-e4f268beb3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_102d72d6-4f49-40b3-a3de-172cc9e71a16" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_6a740a3e-969a-4051-a27e-e4f268beb3eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_6a740a3e-969a-4051-a27e-e4f268beb3eb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6a740a3e-969a-4051-a27e-e4f268beb3eb" xlink:to="loc_us-gaap_EquityComponentDomain_6a740a3e-969a-4051-a27e-e4f268beb3eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e68f6a18-b2de-4f8f-84b2-2f99f60001da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6a740a3e-969a-4051-a27e-e4f268beb3eb" xlink:to="loc_us-gaap_EquityComponentDomain_e68f6a18-b2de-4f8f-84b2-2f99f60001da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_77fdbbe9-3b07-47ef-b78e-dc8460be3134" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e68f6a18-b2de-4f8f-84b2-2f99f60001da" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_77fdbbe9-3b07-47ef-b78e-dc8460be3134" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember_ccf14c72-9321-4a18-8e12-24a401f23c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_77fdbbe9-3b07-47ef-b78e-dc8460be3134" xlink:to="loc_us-gaap_AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember_ccf14c72-9321-4a18-8e12-24a401f23c5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_291d3a8a-1d71-4a46-b437-382573a03975" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_77fdbbe9-3b07-47ef-b78e-dc8460be3134" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_291d3a8a-1d71-4a46-b437-382573a03975" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember_e27dcbb0-5d53-4f97-af5b-826810a26b1f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_77fdbbe9-3b07-47ef-b78e-dc8460be3134" xlink:to="loc_us-gaap_AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember_e27dcbb0-5d53-4f97-af5b-826810a26b1f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_f27611cf-ba64-43df-bbee-03436df536ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_77fdbbe9-3b07-47ef-b78e-dc8460be3134" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_f27611cf-ba64-43df-bbee-03436df536ab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_37cd7cac-829b-4157-a1e2-2679eaf7bf1a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_c99df15f-3aea-406e-903d-e99d718d4ba1" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_37cd7cac-829b-4157-a1e2-2679eaf7bf1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f5128f95-e8d9-4563-b631-88fa844cadb0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_37cd7cac-829b-4157-a1e2-2679eaf7bf1a" xlink:to="loc_us-gaap_StockholdersEquity_f5128f95-e8d9-4563-b631-88fa844cadb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_163e8397-3986-44ca-851a-7dc5f7642659" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_37cd7cac-829b-4157-a1e2-2679eaf7bf1a" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_163e8397-3986-44ca-851a-7dc5f7642659" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_29be8477-15ce-42f1-94e7-247cc33ec407" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_37cd7cac-829b-4157-a1e2-2679eaf7bf1a" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_29be8477-15ce-42f1-94e7-247cc33ec407" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_4f279d44-db96-47c4-94c3-f8a6c58a43c9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_37cd7cac-829b-4157-a1e2-2679eaf7bf1a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_4f279d44-db96-47c4-94c3-f8a6c58a43c9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_bac23c4b-c3a2-498d-b286-79b77a1c22c5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/VariableInterestEntitiesDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#VariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/VariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_4f32a13d-2662-4699-af99-fd4290f0976c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_487e7e84-f367-4026-ab92-4bd86c70653b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_4f32a13d-2662-4699-af99-fd4290f0976c" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_487e7e84-f367-4026-ab92-4bd86c70653b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_9e288a5c-5fac-4b00-8581-74bb6da297a6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_487e7e84-f367-4026-ab92-4bd86c70653b" xlink:to="loc_srt_ConsolidatedEntitiesAxis_9e288a5c-5fac-4b00-8581-74bb6da297a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_9e288a5c-5fac-4b00-8581-74bb6da297a6_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_9e288a5c-5fac-4b00-8581-74bb6da297a6" xlink:to="loc_srt_ConsolidatedEntitiesDomain_9e288a5c-5fac-4b00-8581-74bb6da297a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_9159595d-5d54-4e29-8402-d521abf1c2c0" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_9e288a5c-5fac-4b00-8581-74bb6da297a6" xlink:to="loc_srt_ConsolidatedEntitiesDomain_9159595d-5d54-4e29-8402-d521abf1c2c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_f86f23b3-5f89-4289-993e-17920dec0d1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_9159595d-5d54-4e29-8402-d521abf1c2c0" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_f86f23b3-5f89-4289-993e-17920dec0d1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_4f634dfa-e147-49f6-9e4d-e09f9fd591a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_9159595d-5d54-4e29-8402-d521abf1c2c0" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_4f634dfa-e147-49f6-9e4d-e09f9fd591a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_8f286b78-7fe5-43e8-8192-ffa7c4fe9073" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_487e7e84-f367-4026-ab92-4bd86c70653b" xlink:to="loc_dei_LegalEntityAxis_8f286b78-7fe5-43e8-8192-ffa7c4fe9073" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8f286b78-7fe5-43e8-8192-ffa7c4fe9073_default" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8f286b78-7fe5-43e8-8192-ffa7c4fe9073" xlink:to="loc_dei_EntityDomain_8f286b78-7fe5-43e8-8192-ffa7c4fe9073_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7d45f36f-1a2c-4c0b-a757-87c373b2c768" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8f286b78-7fe5-43e8-8192-ffa7c4fe9073" xlink:to="loc_dei_EntityDomain_7d45f36f-1a2c-4c0b-a757-87c373b2c768" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_PPMRRGMember_bbe11562-3525-473c-8c39-6f6c4c0b4a4d" xlink:href="pra-20240930.xsd#pra_PPMRRGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7d45f36f-1a2c-4c0b-a757-87c373b2c768" xlink:to="loc_pra_PPMRRGMember_bbe11562-3525-473c-8c39-6f6c4c0b4a4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_f5bf4d91-b76e-4fb5-ad94-126f44870bc1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_4f32a13d-2662-4699-af99-fd4290f0976c" xlink:to="loc_us-gaap_Assets_f5bf4d91-b76e-4fb5-ad94-126f44870bc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SurplusNotes_a424d82e-cfee-4190-b8e6-d4ba77c228b0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SurplusNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_4f32a13d-2662-4699-af99-fd4290f0976c" xlink:to="loc_us-gaap_SurplusNotes_a424d82e-cfee-4190-b8e6-d4ba77c228b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_98637648-2d7e-4d22-928f-14cc7d8cf559" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_4f32a13d-2662-4699-af99-fd4290f0976c" xlink:to="loc_us-gaap_Liabilities_98637648-2d7e-4d22-928f-14cc7d8cf559" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/EarningsLossPerShareEarningsPerShareDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#EarningsLossPerShareEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/EarningsLossPerShareEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0fab4b1b-29e4-4252-bf8d-f7d6b0496820" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_84060f85-2dc8-4e36-ba85-7a3763789cf6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0fab4b1b-29e4-4252-bf8d-f7d6b0496820" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_84060f85-2dc8-4e36-ba85-7a3763789cf6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_9bb259dc-4be7-40be-b94f-a93bb3ae3ed5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_84060f85-2dc8-4e36-ba85-7a3763789cf6" xlink:to="loc_us-gaap_AwardTypeAxis_9bb259dc-4be7-40be-b94f-a93bb3ae3ed5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9bb259dc-4be7-40be-b94f-a93bb3ae3ed5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_9bb259dc-4be7-40be-b94f-a93bb3ae3ed5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9bb259dc-4be7-40be-b94f-a93bb3ae3ed5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_378c53fb-446b-4b0a-879c-1e02a3d8a010" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_9bb259dc-4be7-40be-b94f-a93bb3ae3ed5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_378c53fb-446b-4b0a-879c-1e02a3d8a010" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_64159c93-0159-48b4-b353-d8abfccfd2a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_378c53fb-446b-4b0a-879c-1e02a3d8a010" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_64159c93-0159-48b4-b353-d8abfccfd2a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_b720f798-964a-40bd-bc99-5dd6648cbbcc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_378c53fb-446b-4b0a-879c-1e02a3d8a010" xlink:to="loc_us-gaap_PerformanceSharesMember_b720f798-964a-40bd-bc99-5dd6648cbbcc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_13a43634-4785-4bd3-b054-0dae27e2c09a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0fab4b1b-29e4-4252-bf8d-f7d6b0496820" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_13a43634-4785-4bd3-b054-0dae27e2c09a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_fe9e9d2f-7938-4360-bccb-a6c9450fc362" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0fab4b1b-29e4-4252-bf8d-f7d6b0496820" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_fe9e9d2f-7938-4360-bccb-a6c9450fc362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_68fbec6f-4a6e-488f-bda1-65fdfbb368bb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0fab4b1b-29e4-4252-bf8d-f7d6b0496820" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_68fbec6f-4a6e-488f-bda1-65fdfbb368bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_47817ea8-7299-444f-8206-d29077d8d7b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0fab4b1b-29e4-4252-bf8d-f7d6b0496820" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_47817ea8-7299-444f-8206-d29077d8d7b6" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/SegmentInformationFinancialDatabySegmentDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#SegmentInformationFinancialDatabySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/SegmentInformationFinancialDatabySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ac513515-6d7c-41c5-83d4-7fa4b568ba58" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ac513515-6d7c-41c5-83d4-7fa4b568ba58" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_95c79d77-5fed-4a95-a7d4-966759462e4c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ac513515-6d7c-41c5-83d4-7fa4b568ba58" xlink:to="loc_srt_ConsolidationItemsAxis_95c79d77-5fed-4a95-a7d4-966759462e4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_95c79d77-5fed-4a95-a7d4-966759462e4c_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_95c79d77-5fed-4a95-a7d4-966759462e4c" xlink:to="loc_srt_ConsolidationItemsDomain_95c79d77-5fed-4a95-a7d4-966759462e4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_953d50a8-538f-4d0b-866d-4c9ddc21aa5b" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_95c79d77-5fed-4a95-a7d4-966759462e4c" xlink:to="loc_srt_ConsolidationItemsDomain_953d50a8-538f-4d0b-866d-4c9ddc21aa5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_22d944f1-230d-40ac-a4bc-bdc8402a927d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_953d50a8-538f-4d0b-866d-4c9ddc21aa5b" xlink:to="loc_us-gaap_OperatingSegmentsMember_22d944f1-230d-40ac-a4bc-bdc8402a927d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_f8d6946c-f9a3-4ccc-9c40-a1d34fe893e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_953d50a8-538f-4d0b-866d-4c9ddc21aa5b" xlink:to="loc_us-gaap_IntersegmentEliminationMember_f8d6946c-f9a3-4ccc-9c40-a1d34fe893e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_63312d13-1458-4349-9fa1-9a4442643c26" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_953d50a8-538f-4d0b-866d-4c9ddc21aa5b" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_63312d13-1458-4349-9fa1-9a4442643c26" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_c679ac08-f6ac-4a30-aaf9-d07009ac7ad6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ac513515-6d7c-41c5-83d4-7fa4b568ba58" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_c679ac08-f6ac-4a30-aaf9-d07009ac7ad6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c679ac08-f6ac-4a30-aaf9-d07009ac7ad6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c679ac08-f6ac-4a30-aaf9-d07009ac7ad6" xlink:to="loc_us-gaap_SegmentDomain_c679ac08-f6ac-4a30-aaf9-d07009ac7ad6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_70329cef-cbee-4f1f-8678-1ea7700b7ac1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c679ac08-f6ac-4a30-aaf9-d07009ac7ad6" xlink:to="loc_us-gaap_SegmentDomain_70329cef-cbee-4f1f-8678-1ea7700b7ac1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SpecialtyPropertyandCasualtyMember_bda022c1-95ae-48bb-a5db-c6ae4bd3e686" xlink:href="pra-20240930.xsd#pra_SpecialtyPropertyandCasualtyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_70329cef-cbee-4f1f-8678-1ea7700b7ac1" xlink:to="loc_pra_SpecialtyPropertyandCasualtyMember_bda022c1-95ae-48bb-a5db-c6ae4bd3e686" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_WorkersCompensationInsuranceSegmentMember_2fe63a9c-285e-48f2-9c27-56df54821aba" xlink:href="pra-20240930.xsd#pra_WorkersCompensationInsuranceSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_70329cef-cbee-4f1f-8678-1ea7700b7ac1" xlink:to="loc_pra_WorkersCompensationInsuranceSegmentMember_2fe63a9c-285e-48f2-9c27-56df54821aba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SegregatedPortfolioCellReinsuranceMember_d2b66d71-a767-4db0-86d1-899cf72ce6ba" xlink:href="pra-20240930.xsd#pra_SegregatedPortfolioCellReinsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_70329cef-cbee-4f1f-8678-1ea7700b7ac1" xlink:to="loc_pra_SegregatedPortfolioCellReinsuranceMember_d2b66d71-a767-4db0-86d1-899cf72ce6ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateMember_62259a06-29eb-4cf3-828e-c65cb85c7301" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_70329cef-cbee-4f1f-8678-1ea7700b7ac1" xlink:to="loc_us-gaap_CorporateMember_62259a06-29eb-4cf3-828e-c65cb85c7301" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_dd36971f-5f3c-4ef1-9f79-c875f49a276f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ac513515-6d7c-41c5-83d4-7fa4b568ba58" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_dd36971f-5f3c-4ef1-9f79-c875f49a276f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_dd36971f-5f3c-4ef1-9f79-c875f49a276f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_dd36971f-5f3c-4ef1-9f79-c875f49a276f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_dd36971f-5f3c-4ef1-9f79-c875f49a276f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9f4b1362-fb6d-4b9f-9d9d-fefd5dbe0870" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_dd36971f-5f3c-4ef1-9f79-c875f49a276f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9f4b1362-fb6d-4b9f-9d9d-fefd5dbe0870" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_NORCALGroupMember_ba796459-61f8-4449-ba29-112c9a69532f" xlink:href="pra-20240930.xsd#pra_NORCALGroupMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9f4b1362-fb6d-4b9f-9d9d-fefd5dbe0870" xlink:to="loc_pra_NORCALGroupMember_ba796459-61f8-4449-ba29-112c9a69532f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_54949333-99db-4151-bfdb-86b7bc08f9f0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_PremiumsEarnedNet_54949333-99db-4151-bfdb-86b7bc08f9f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_91eb772e-0b95-4b39-94a1-11921495a024" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_NetInvestmentIncome_91eb772e-0b95-4b39-94a1-11921495a024" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_EquityInEarningsLossOfUnconsolidatedSubsidiaries_ee60ef29-a864-4dee-b405-af1676809169" xlink:href="pra-20240930.xsd#pra_EquityInEarningsLossOfUnconsolidatedSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_EquityInEarningsLossOfUnconsolidatedSubsidiaries_ee60ef29-a864-4dee-b405-af1676809169" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_GainLossOnInvestmentsExcludingBusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability_0d138866-bdde-49c3-bb2a-5a0b1e3b1e3b" xlink:href="pra-20240930.xsd#pra_GainLossOnInvestmentsExcludingBusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_GainLossOnInvestmentsExcludingBusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability_0d138866-bdde-49c3-bb2a-5a0b1e3b1e3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome_20769880-2e4e-424d-8593-2130ae00f04a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_OtherIncome_20769880-2e4e-424d-8593-2130ae00f04a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_179bcf84-cbb6-4111-85ab-e4b410d1932f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_179bcf84-cbb6-4111-85ab-e4b410d1932f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_UnderwritingPolicyAcquisitionAndOperatingExpense_86ac0814-8e72-41a8-a6eb-a3101bde9482" xlink:href="pra-20240930.xsd#pra_UnderwritingPolicyAcquisitionAndOperatingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_UnderwritingPolicyAcquisitionAndOperatingExpense_86ac0814-8e72-41a8-a6eb-a3101bde9482" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SegregatedPortfolioCellsIncomeTaxExpenseBenefit_2de617eb-051c-428a-9374-2f082559eda9" xlink:href="pra-20240930.xsd#pra_SegregatedPortfolioCellsIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_SegregatedPortfolioCellsIncomeTaxExpenseBenefit_2de617eb-051c-428a-9374-2f082559eda9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SegregatedPortfolioCellsDividendExpenseIncome_9041d799-7e50-49be-b763-f961d995ad57" xlink:href="pra-20240930.xsd#pra_SegregatedPortfolioCellsDividendExpenseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_SegregatedPortfolioCellsDividendExpenseIncome_9041d799-7e50-49be-b763-f961d995ad57" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_27258ca5-02ef-469e-8615-cef24c419a21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_InterestExpenseOperating_27258ca5-02ef-469e-8615-cef24c419a21" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_IncomeTaxExpenseBenefitExcludingBusinessAcquisitionTaxEffect_e8f6f3aa-dfc5-4551-ad50-0650f1bdbcf3" xlink:href="pra-20240930.xsd#pra_IncomeTaxExpenseBenefitExcludingBusinessAcquisitionTaxEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_IncomeTaxExpenseBenefitExcludingBusinessAcquisitionTaxEffect_e8f6f3aa-dfc5-4551-ad50-0650f1bdbcf3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SegmentProfitLoss_a2b7f695-f9b8-430b-95c5-6c88b77f50b0" xlink:href="pra-20240930.xsd#pra_SegmentProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_pra_SegmentProfitLoss_a2b7f695-f9b8-430b-95c5-6c88b77f50b0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_79916979-924e-43c7-b0ce-9201a413405f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_79916979-924e-43c7-b0ce-9201a413405f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_736c237a-0ff8-427b-bfc5-5e1f3ed30694" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_736c237a-0ff8-427b-bfc5-5e1f3ed30694" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_40a6df49-dd17-4a10-ba9a-8f59d2fe6a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_40a6df49-dd17-4a10-ba9a-8f59d2fe6a3a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_95e1c659-ed23-46ed-b0ae-4775feda7626" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_NetIncomeLoss_95e1c659-ed23-46ed-b0ae-4775feda7626" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_9e43abdb-8be9-4bcb-a44c-4c3490d2d346" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepreciationAmortizationAndAccretionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_774f3ebf-15b6-473c-acf7-7bb8a0fe7833" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_9e43abdb-8be9-4bcb-a44c-4c3490d2d346" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.proassurance.com/role/SegmentInformationGrossPremiumsEarnedandReconciliationtoNetPremiumsDetails" xlink:type="simple" xlink:href="pra-20240930.xsd#SegmentInformationGrossPremiumsEarnedandReconciliationtoNetPremiumsDetails"/>
  <link:definitionLink xlink:role="http://www.proassurance.com/role/SegmentInformationGrossPremiumsEarnedandReconciliationtoNetPremiumsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_c9bc1643-f662-4cee-82fc-458f8389de1d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6e5823a8-5b5a-41b5-b275-893d62caeecb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_c9bc1643-f662-4cee-82fc-458f8389de1d" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6e5823a8-5b5a-41b5-b275-893d62caeecb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_25251ec9-bce8-47e4-a664-1146c0196be0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6e5823a8-5b5a-41b5-b275-893d62caeecb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_25251ec9-bce8-47e4-a664-1146c0196be0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_25251ec9-bce8-47e4-a664-1146c0196be0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_25251ec9-bce8-47e4-a664-1146c0196be0" xlink:to="loc_us-gaap_SegmentDomain_25251ec9-bce8-47e4-a664-1146c0196be0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_1c7d246a-1691-4df5-b07a-af8aa80c18fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_25251ec9-bce8-47e4-a664-1146c0196be0" xlink:to="loc_us-gaap_SegmentDomain_1c7d246a-1691-4df5-b07a-af8aa80c18fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SpecialtyPropertyandCasualtyMember_c657c208-59b0-496f-869b-ae023f9a53d0" xlink:href="pra-20240930.xsd#pra_SpecialtyPropertyandCasualtyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1c7d246a-1691-4df5-b07a-af8aa80c18fe" xlink:to="loc_pra_SpecialtyPropertyandCasualtyMember_c657c208-59b0-496f-869b-ae023f9a53d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_WorkersCompensationInsuranceSegmentMember_b3d9b785-e714-4011-a157-7a9aab81e926" xlink:href="pra-20240930.xsd#pra_WorkersCompensationInsuranceSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1c7d246a-1691-4df5-b07a-af8aa80c18fe" xlink:to="loc_pra_WorkersCompensationInsuranceSegmentMember_b3d9b785-e714-4011-a157-7a9aab81e926" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_SegregatedPortfolioCellReinsuranceMember_b6bbff68-b1c0-4d35-9dda-d785b8ffe8fb" xlink:href="pra-20240930.xsd#pra_SegregatedPortfolioCellReinsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_1c7d246a-1691-4df5-b07a-af8aa80c18fe" xlink:to="loc_pra_SegregatedPortfolioCellReinsuranceMember_b6bbff68-b1c0-4d35-9dda-d785b8ffe8fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_da592ebd-d2de-4f0a-b742-e32800567e56" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6e5823a8-5b5a-41b5-b275-893d62caeecb" xlink:to="loc_srt_ProductOrServiceAxis_da592ebd-d2de-4f0a-b742-e32800567e56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_da592ebd-d2de-4f0a-b742-e32800567e56_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_da592ebd-d2de-4f0a-b742-e32800567e56" xlink:to="loc_srt_ProductsAndServicesDomain_da592ebd-d2de-4f0a-b742-e32800567e56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_da592ebd-d2de-4f0a-b742-e32800567e56" xlink:to="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_MPLMember_7ec09f44-3a6a-4506-b0d8-869afd6ffdd3" xlink:href="pra-20240930.xsd#pra_MPLMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_MPLMember_7ec09f44-3a6a-4506-b0d8-869afd6ffdd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_MedicalTechnologyAndLifeSciencesProductLiabilityMember_c50cdc1f-e15b-4899-82c2-94b434fc8cfe" xlink:href="pra-20240930.xsd#pra_MedicalTechnologyAndLifeSciencesProductLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_MedicalTechnologyAndLifeSciencesProductLiabilityMember_c50cdc1f-e15b-4899-82c2-94b434fc8cfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_LloydsSyndicatesMember_a2363d5c-a37d-45e0-999e-9b0b0f067b4a" xlink:href="pra-20240930.xsd#pra_LloydsSyndicatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_LloydsSyndicatesMember_a2363d5c-a37d-45e0-999e-9b0b0f067b4a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_OtherPremiumsMember_e58289a7-7b68-4c79-94f0-e5cf398c747c" xlink:href="pra-20240930.xsd#pra_OtherPremiumsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_OtherPremiumsMember_e58289a7-7b68-4c79-94f0-e5cf398c747c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_TraditionalBusinessMember_b7546ddc-9aae-4f38-a69a-47f336519cc1" xlink:href="pra-20240930.xsd#pra_TraditionalBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_TraditionalBusinessMember_b7546ddc-9aae-4f38-a69a-47f336519cc1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_AlternativeMarketBusinessMember_503b00d7-862f-4638-862c-b0c01809718d" xlink:href="pra-20240930.xsd#pra_AlternativeMarketBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_AlternativeMarketBusinessMember_503b00d7-862f-4638-862c-b0c01809718d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_WorkersCompensationAlternativeMarketBusinessMember_899aba76-04ab-4266-aa0f-88fb85c901b6" xlink:href="pra-20240930.xsd#pra_WorkersCompensationAlternativeMarketBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_264b1e0e-f729-491f-b5ab-1ff680257950" xlink:to="loc_pra_WorkersCompensationAlternativeMarketBusinessMember_899aba76-04ab-4266-aa0f-88fb85c901b6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_1f637520-b554-4850-9230-3ea66f8eec1e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_6e5823a8-5b5a-41b5-b275-893d62caeecb" xlink:to="loc_srt_ConsolidationItemsAxis_1f637520-b554-4850-9230-3ea66f8eec1e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_1f637520-b554-4850-9230-3ea66f8eec1e_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_1f637520-b554-4850-9230-3ea66f8eec1e" xlink:to="loc_srt_ConsolidationItemsDomain_1f637520-b554-4850-9230-3ea66f8eec1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_ffe1ee96-4c7b-4504-b6b8-0539811cf36c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_1f637520-b554-4850-9230-3ea66f8eec1e" xlink:to="loc_srt_ConsolidationItemsDomain_ffe1ee96-4c7b-4504-b6b8-0539811cf36c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_3e31d035-b5d3-491b-9bec-1effd3c916b1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_ffe1ee96-4c7b-4504-b6b8-0539811cf36c" xlink:to="loc_us-gaap_OperatingSegmentsMember_3e31d035-b5d3-491b-9bec-1effd3c916b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pra_GrossPremiumsEarned_c63b00aa-8a52-4ac0-a5fc-1cf7ea1abc92" xlink:href="pra-20240930.xsd#pra_GrossPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_c9bc1643-f662-4cee-82fc-458f8389de1d" xlink:to="loc_pra_GrossPremiumsEarned_c63b00aa-8a52-4ac0-a5fc-1cf7ea1abc92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsEarned_9948f021-02e5-452a-9420-88dae4a41424" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CededPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_c9bc1643-f662-4cee-82fc-458f8389de1d" xlink:to="loc_us-gaap_CededPremiumsEarned_9948f021-02e5-452a-9420-88dae4a41424" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_71d8e9c3-a9d2-4e9c-97cd-3cfd4a29cf1a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_c9bc1643-f662-4cee-82fc-458f8389de1d" xlink:to="loc_us-gaap_PremiumsEarnedNet_71d8e9c3-a9d2-4e9c-97cd-3cfd4a29cf1a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/AwardTypeOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#AwardTypeOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/AwardTypeOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_PerformanceSharesMember" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfOtherComprehensiveIncomeAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementOfOtherComprehensiveIncomeAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfOtherComprehensiveIncomeAbstract" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_NetInvestmentIncome" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>