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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e2bd0-c71c-7575-a18d-40d6de7ab192,g:0841c1d8-4e58-48da-aab4-bf70b86c6dab-->
<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.renre.com/role/CoverPage" xlink:type="simple" xlink:href="rnr-20260630.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019e2bd0-ca8f-70e1-b687-369caf5f40b2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntitiesTable_019e2bd0-ca8f-70e1-b687-369caf5f40b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-ca8f-735d-9c37-67a2b119d59e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019e2bd0-ca8f-70e1-b687-369caf5f40b2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-ca8f-735d-9c37-67a2b119d59e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-735d-9c37-67a2b119d59e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-ca8f-735d-9c37-67a2b119d59e" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-735d-9c37-67a2b119d59e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-777c-8afa-59690fa449e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-ca8f-735d-9c37-67a2b119d59e" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-777c-8afa-59690fa449e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-ca8f-7567-8db3-f7959aa9c4de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-777c-8afa-59690fa449e0" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-ca8f-7567-8db3-f7959aa9c4de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DepositaryShareseachrepresentinga11000thinterestinaSeriesF5.Member_019e2bd0-ca8f-7a9d-bea5-24c23584c3c1" xlink:href="rnr-20260630.xsd#rnr_DepositaryShareseachrepresentinga11000thinterestinaSeriesF5.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-777c-8afa-59690fa449e0" xlink:to="loc_rnr_DepositaryShareseachrepresentinga11000thinterestinaSeriesF5.Member_019e2bd0-ca8f-7a9d-bea5-24c23584c3c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DepositarySharesEachRepresentingA11000thInterestInASeriesG4Member_019e2bd0-ca8f-707e-9487-8f6dbf32fab3" xlink:href="rnr-20260630.xsd#rnr_DepositarySharesEachRepresentingA11000thInterestInASeriesG4Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-ca8f-777c-8afa-59690fa449e0" xlink:to="loc_rnr_DepositarySharesEachRepresentingA11000thInterestInASeriesG4Member_019e2bd0-ca8f-707e-9487-8f6dbf32fab3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e2bd0-ca8f-728d-9c8b-fa7487033359" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_DocumentType_019e2bd0-ca8f-728d-9c8b-fa7487033359" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e2bd0-ca8f-72be-8cd4-e6bd27f82968" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_DocumentQuarterlyReport_019e2bd0-ca8f-72be-8cd4-e6bd27f82968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e2bd0-ca8f-71ca-9d72-61c1b1c70e30" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_DocumentPeriodEndDate_019e2bd0-ca8f-71ca-9d72-61c1b1c70e30" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e2bd0-ca8f-76a2-9059-c0a854a6e88a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_DocumentTransitionReport_019e2bd0-ca8f-76a2-9059-c0a854a6e88a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e2bd0-ca8f-74f3-a97f-3236a67db04c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityFileNumber_019e2bd0-ca8f-74f3-a97f-3236a67db04c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e2bd0-ca8f-7754-9a69-9fe2023d2c2e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityRegistrantName_019e2bd0-ca8f-7754-9a69-9fe2023d2c2e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e2bd0-ca8f-7924-817f-f618ae9385c1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e2bd0-ca8f-7924-817f-f618ae9385c1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e2bd0-ca8f-7f5e-b904-4c8dbaa5168e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e2bd0-ca8f-7f5e-b904-4c8dbaa5168e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e2bd0-ca8f-7df9-abcb-ea79d11b3e66" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityAddressAddressLine1_019e2bd0-ca8f-7df9-abcb-ea79d11b3e66" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019e2bd0-ca8f-7038-8bb7-801462806b9c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityAddressAddressLine2_019e2bd0-ca8f-7038-8bb7-801462806b9c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e2bd0-ca8f-799d-88dc-2bc53c4ab5ee" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityAddressCityOrTown_019e2bd0-ca8f-799d-88dc-2bc53c4ab5ee" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_019e2bd0-ca8f-7b0c-aae6-e2bb6f6998d8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityAddressCountry_019e2bd0-ca8f-7b0c-aae6-e2bb6f6998d8" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e2bd0-ca8f-748a-8eb9-3f2f39568d39" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityAddressPostalZipCode_019e2bd0-ca8f-748a-8eb9-3f2f39568d39" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e2bd0-ca8f-78bb-85c6-c1916d435ba3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_CityAreaCode_019e2bd0-ca8f-78bb-85c6-c1916d435ba3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e2bd0-ca8f-7b71-a346-7ea1965597c5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_LocalPhoneNumber_019e2bd0-ca8f-7b71-a346-7ea1965597c5" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e2bd0-ca8f-7837-89ab-98e21a47b21b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_Security12bTitle_019e2bd0-ca8f-7837-89ab-98e21a47b21b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e2bd0-ca8f-7b36-a4b2-4299a1d0358f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_TradingSymbol_019e2bd0-ca8f-7b36-a4b2-4299a1d0358f" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e2bd0-ca8f-7eb6-9f72-8ad497f018e9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_SecurityExchangeName_019e2bd0-ca8f-7eb6-9f72-8ad497f018e9" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e2bd0-ca8f-7775-a2ec-633845fbb5a5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityCurrentReportingStatus_019e2bd0-ca8f-7775-a2ec-633845fbb5a5" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e2bd0-ca8f-76bb-a50d-163f93df79b6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e2bd0-ca8f-76bb-a50d-163f93df79b6" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e2bd0-ca8f-744a-9b41-09fce4f05dd9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityFilerCategory_019e2bd0-ca8f-744a-9b41-09fce4f05dd9" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e2bd0-ca8f-7423-9fa4-a10359996e54" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntitySmallBusiness_019e2bd0-ca8f-7423-9fa4-a10359996e54" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e2bd0-ca8f-7266-9de7-c4f5b1da7a5a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e2bd0-ca8f-7266-9de7-c4f5b1da7a5a" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e2bd0-ca8f-76c0-9d84-5137aa52038c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityShellCompany_019e2bd0-ca8f-76c0-9d84-5137aa52038c" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e2bd0-ca8f-75da-bd98-29b207ca2cd8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e2bd0-ca8f-75da-bd98-29b207ca2cd8" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e2bd0-ca8f-7d76-bb5b-9672e5d14201" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_EntityCentralIndexKey_019e2bd0-ca8f-7d76-bb5b-9672e5d14201" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e2bd0-ca8f-7632-ac18-c76b03acf435" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e2bd0-ca8f-7632-ac18-c76b03acf435" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e2bd0-ca8f-73dc-b7a9-8ee1721048d5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_DocumentFiscalYearFocus_019e2bd0-ca8f-73dc-b7a9-8ee1721048d5" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e2bd0-ca8f-7a04-99cf-3916d28e9555" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e2bd0-ca8f-7a04-99cf-3916d28e9555" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e2bd0-ca8f-730e-9210-faef2859bc25" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019e2bd0-ca8f-7f59-b6ac-bdc7afc80511" xlink:to="loc_dei_AmendmentFlag_019e2bd0-ca8f-730e-9210-faef2859bc25" xlink:type="arc" order="29"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="simple" xlink:href="rnr-20260630.xsd#ConsolidatedStatementsofChangesinShareholdersEquity"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e2bd0-ca8f-75b6-a5fd-12dcf304dece" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e2bd0-ca8f-7c96-9aba-961c1795f6b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e2bd0-ca8f-75b6-a5fd-12dcf304dece" xlink:to="loc_us-gaap_StatementTable_019e2bd0-ca8f-7c96-9aba-961c1795f6b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e2bd0-ca8f-74c5-ac97-09008f74d7d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e2bd0-ca8f-7c96-9aba-961c1795f6b2" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e2bd0-ca8f-74c5-ac97-09008f74d7d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-74c5-ac97-09008f74d7d4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e2bd0-ca8f-74c5-ac97-09008f74d7d4" xlink:to="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-74c5-ac97-09008f74d7d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e2bd0-ca8f-74c5-ac97-09008f74d7d4" xlink:to="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_019e2bd0-ca8f-73d6-821c-258098acd06a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:to="loc_us-gaap_PreferredStockMember_019e2bd0-ca8f-73d6-821c-258098acd06a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-ca8f-7bdf-8dd5-92571c3a32ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-ca8f-7bdf-8dd5-92571c3a32ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e2bd0-ca8f-738c-b92d-27bf87179e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e2bd0-ca8f-738c-b92d-27bf87179e1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e2bd0-ca8f-70be-85fd-0f9e3f9ff95f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e2bd0-ca8f-70be-85fd-0f9e3f9ff95f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e2bd0-ca8f-71e9-8221-623042ec5902" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e2bd0-ca8f-7b9d-8ce0-217fcc38e187" xlink:to="loc_us-gaap_RetainedEarningsMember_019e2bd0-ca8f-71e9-8221-623042ec5902" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e2bd0-ca8f-75b6-a5fd-12dcf304dece" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e2bd0-ca8f-78cf-9961-1e7a0b11bebf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_StockholdersEquity_019e2bd0-ca8f-78cf-9961-1e7a0b11bebf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019e2bd0-ca8f-7f3e-8721-10d44ae98b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019e2bd0-ca8f-7f3e-8721-10d44ae98b3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_019e2bd0-ca8f-781c-ad6d-5ac80013a814" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_019e2bd0-ca8f-781c-ad6d-5ac80013a814" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_SharesIssuedValueShareBasedPaymentArrangementAfterForfeitureNet_019e2bd0-ca8f-7ceb-903c-152ccf4cd4f3" xlink:href="rnr-20260630.xsd#rnr_SharesIssuedValueShareBasedPaymentArrangementAfterForfeitureNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_rnr_SharesIssuedValueShareBasedPaymentArrangementAfterForfeitureNet_019e2bd0-ca8f-7ceb-903c-152ccf4cd4f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019e2bd0-ca8f-7a4a-ba6d-86f92d422b2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019e2bd0-ca8f-7a4a-ba6d-86f92d422b2c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_019e2bd0-ca8f-71fe-bf9b-dd9076de2807" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_019e2bd0-ca8f-71fe-bf9b-dd9076de2807" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e2bd0-ca8f-7a65-9e3c-7e8cdee88066" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_ProfitLoss_019e2bd0-ca8f-7a65-9e3c-7e8cdee88066" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-ca8f-7f36-a25c-a8cb1754f901" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-ca8f-7f36-a25c-a8cb1754f901" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_019e2bd0-ca8f-79ec-96d0-cb5c7dbf10d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_DividendsCommonStock_019e2bd0-ca8f-79ec-96d0-cb5c7dbf10d1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStock_019e2bd0-ca8f-7231-87c6-5d99b149fc1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e2bd0-ca8f-76f1-8e7d-ec44734540eb" xlink:to="loc_us-gaap_DividendsPreferredStock_019e2bd0-ca8f-7231-87c6-5d99b149fc1a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e2bd0-ca8f-74b2-996a-055fcf62660c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofFairValueofFixedMaturityInvestmentsTradingDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofFairValueofFixedMaturityInvestmentsTradingDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofFairValueofFixedMaturityInvestmentsTradingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7c23-96df-9062d785d0ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-71f4-b353-a9b4c521da6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7c23-96df-9062d785d0ea" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-71f4-b353-a9b4c521da6f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7894-a88f-0faa67e5f8f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-71f4-b353-a9b4c521da6f" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7894-a88f-0faa67e5f8f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7894-a88f-0faa67e5f8f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7894-a88f-0faa67e5f8f6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7894-a88f-0faa67e5f8f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7894-a88f-0faa67e5f8f6" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e2bd0-cb55-7266-9523-15aa66c97116" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e2bd0-cb55-7266-9523-15aa66c97116" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7b24-899c-1a49d88c6383" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7b24-899c-1a49d88c6383" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_019e2bd0-cb55-715d-bca3-db9da2559a6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_019e2bd0-cb55-715d-bca3-db9da2559a6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7c93-b01c-888e73a07902" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7c93-b01c-888e73a07902" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019e2bd0-cb55-7a13-9a77-55f783a26334" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019e2bd0-cb55-7a13-9a77-55f783a26334" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AgencySecuritiesMember_019e2bd0-cb55-73f8-908f-3773ce2e39a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AgencySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_AgencySecuritiesMember_019e2bd0-cb55-73f8-908f-3773ce2e39a5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_019e2bd0-cb55-7adb-aee7-170d67aad81d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7296-8a49-e2f4dde31a1a" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_019e2bd0-cb55-7adb-aee7-170d67aad81d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-77e3-9f06-6c5aafaa0516" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7c23-96df-9062d785d0ea" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-77e3-9f06-6c5aafaa0516" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofContractualMaturitiesofFixedMaturityInvestmentsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofContractualMaturitiesofFixedMaturityInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofContractualMaturitiesofFixedMaturityInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7232-8cdd-10473b855db3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7376-86df-ad4fc256c1fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7232-8cdd-10473b855db3" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7376-86df-ad4fc256c1fb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7e71-8592-bf0a717ccad3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7376-86df-ad4fc256c1fb" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7e71-8592-bf0a717ccad3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7e71-8592-bf0a717ccad3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7e71-8592-bf0a717ccad3" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7e71-8592-bf0a717ccad3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7db8-b822-521a8d52ad89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7e71-8592-bf0a717ccad3" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7db8-b822-521a8d52ad89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_019e2bd0-cb55-79e4-90eb-c807976b5bd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7db8-b822-521a8d52ad89" xlink:to="loc_us-gaap_MortgageBackedSecuritiesMember_019e2bd0-cb55-79e4-90eb-c807976b5bd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-744b-b907-d2c5aa286013" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7db8-b822-521a8d52ad89" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-744b-b907-d2c5aa286013" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7232-8cdd-10473b855db3" xlink:to="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesWithinOneYearAmortizedCostBasis_019e2bd0-cb55-72f7-8575-66bc9c290da3" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesWithinOneYearAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesWithinOneYearAmortizedCostBasis_019e2bd0-cb55-72f7-8575-66bc9c290da3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCostBasis_019e2bd0-cb55-7ac9-b6ce-a89af950d14e" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCostBasis_019e2bd0-cb55-7ac9-b6ce-a89af950d14e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCostBasis_019e2bd0-cb55-727b-a20f-1cb6ddd3004c" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCostBasis_019e2bd0-cb55-727b-a20f-1cb6ddd3004c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesAfterTenYearsAmortizedCostBasis_019e2bd0-cb55-794a-8f35-25e763a6f548" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesAfterTenYearsAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesAfterTenYearsAmortizedCostBasis_019e2bd0-cb55-794a-8f35-25e763a6f548" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebtAmortizedCost_019e2bd0-cb55-72f9-b5e6-a6802d47adc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebtAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiCostAbstract_019e2bd0-cb55-7130-902d-f3cacf6fcd4a" xlink:to="loc_us-gaap_TradingSecuritiesDebtAmortizedCost_019e2bd0-cb55-72f9-b5e6-a6802d47adc9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7232-8cdd-10473b855db3" xlink:to="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesWithinOneYearFairValue_019e2bd0-cb55-7fb6-b8f5-afc21ba10e97" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesWithinOneYearFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesWithinOneYearFairValue_019e2bd0-cb55-7fb6-b8f5-afc21ba10e97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019e2bd0-cb55-774b-aa4d-87fcceb6b2f5" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019e2bd0-cb55-774b-aa4d-87fcceb6b2f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019e2bd0-cb55-7753-bcca-b2c5f5e9082c" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019e2bd0-cb55-7753-bcca-b2c5f5e9082c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_TradingSecuritiesDebtMaturitiesAfterTenYearsFairValue_019e2bd0-cb55-71ff-8082-8de18986fa98" xlink:href="rnr-20260630.xsd#rnr_TradingSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:to="loc_rnr_TradingSecuritiesDebtMaturitiesAfterTenYearsFairValue_019e2bd0-cb55-71ff-8082-8de18986fa98" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-7271-8702-f87d4e749256" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_019e2bd0-cb55-7e9e-9186-9a8c81ecb3a1" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-7271-8702-f87d4e749256" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofFairValueofEquityInvestmentsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofFairValueofEquityInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofFairValueofEquityInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019e2bd0-cb55-770f-8820-e47a9f6e68ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019e2bd0-cb55-774f-9a46-855ba5e38b76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019e2bd0-cb55-770f-8820-e47a9f6e68ed" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019e2bd0-cb55-774f-9a46-855ba5e38b76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-777e-8ad9-9b5a57e2b385" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019e2bd0-cb55-774f-9a46-855ba5e38b76" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-777e-8ad9-9b5a57e2b385" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-777e-8ad9-9b5a57e2b385_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-777e-8ad9-9b5a57e2b385" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-777e-8ad9-9b5a57e2b385_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72c4-881f-76a8d9914329" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-777e-8ad9-9b5a57e2b385" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72c4-881f-76a8d9914329" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeFundsMember_019e2bd0-cb55-7bea-b94d-5e6068dfe5d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72c4-881f-76a8d9914329" xlink:to="loc_us-gaap_FixedIncomeFundsMember_019e2bd0-cb55-7bea-b94d-5e6068dfe5d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_EquityExchangeTradedFundsMember_019e2bd0-cb55-71e2-95f3-f61d60fa41cc" xlink:href="rnr-20260630.xsd#rnr_EquityExchangeTradedFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72c4-881f-76a8d9914329" xlink:to="loc_rnr_EquityExchangeTradedFundsMember_019e2bd0-cb55-71e2-95f3-f61d60fa41cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-cb55-7eed-acc0-066f031ba96a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72c4-881f-76a8d9914329" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-cb55-7eed-acc0-066f031ba96a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesByIndustryAxis_019e2bd0-cb55-758c-b67c-81c3bbc55c15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesByIndustryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019e2bd0-cb55-774f-9a46-855ba5e38b76" xlink:to="loc_us-gaap_EquitySecuritiesByIndustryAxis_019e2bd0-cb55-758c-b67c-81c3bbc55c15" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_019e2bd0-cb55-758c-b67c-81c3bbc55c15_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_019e2bd0-cb55-758c-b67c-81c3bbc55c15" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_019e2bd0-cb55-758c-b67c-81c3bbc55c15_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesIndustryMember_019e2bd0-cb55-7b03-b497-9b5dbfb7eead" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesIndustryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByIndustryAxis_019e2bd0-cb55-758c-b67c-81c3bbc55c15" xlink:to="loc_us-gaap_EquitySecuritiesIndustryMember_019e2bd0-cb55-7b03-b497-9b5dbfb7eead" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServicesSectorMember_019e2bd0-cb55-7a11-8699-797a4a43b07e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialServicesSectorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesIndustryMember_019e2bd0-cb55-7b03-b497-9b5dbfb7eead" xlink:to="loc_us-gaap_FinancialServicesSectorMember_019e2bd0-cb55-7a11-8699-797a4a43b07e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_OtherCommonStockInvestmentsMember_019e2bd0-cb55-736f-86bd-7c59ea03567f" xlink:href="rnr-20260630.xsd#rnr_OtherCommonStockInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesIndustryMember_019e2bd0-cb55-7b03-b497-9b5dbfb7eead" xlink:to="loc_rnr_OtherCommonStockInvestmentsMember_019e2bd0-cb55-736f-86bd-7c59ea03567f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019e2bd0-cb55-787f-b511-e5d32dfcc868" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019e2bd0-cb55-770f-8820-e47a9f6e68ed" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019e2bd0-cb55-787f-b511-e5d32dfcc868" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSNarrativeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e2bd0-cb55-7fc2-8b9c-81310c96d1e1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:to="loc_srt_RangeAxis_019e2bd0-cb55-7fc2-8b9c-81310c96d1e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e2bd0-cb55-7fc2-8b9c-81310c96d1e1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e2bd0-cb55-7fc2-8b9c-81310c96d1e1" xlink:to="loc_srt_RangeMember_019e2bd0-cb55-7fc2-8b9c-81310c96d1e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e2bd0-cb55-71ff-bcad-a26e2ad77551" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e2bd0-cb55-7fc2-8b9c-81310c96d1e1" xlink:to="loc_srt_RangeMember_019e2bd0-cb55-71ff-bcad-a26e2ad77551" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e2bd0-cb55-7a02-8eec-14565160d11a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e2bd0-cb55-71ff-bcad-a26e2ad77551" xlink:to="loc_srt_MinimumMember_019e2bd0-cb55-7a02-8eec-14565160d11a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e2bd0-cb55-706c-a610-bbf291dae000" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e2bd0-cb55-71ff-bcad-a26e2ad77551" xlink:to="loc_srt_MaximumMember_019e2bd0-cb55-706c-a610-bbf291dae000" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7093-981c-564166ee8c79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7093-981c-564166ee8c79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7093-981c-564166ee8c79_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7093-981c-564166ee8c79" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7093-981c-564166ee8c79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7780-b773-f33cb92de8f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7093-981c-564166ee8c79" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7780-b773-f33cb92de8f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PrivateCreditFundsMember_019e2bd0-cb55-74b2-90f1-de45b2b68109" xlink:href="rnr-20260630.xsd#rnr_PrivateCreditFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7780-b773-f33cb92de8f6" xlink:to="loc_rnr_PrivateCreditFundsMember_019e2bd0-cb55-74b2-90f1-de45b2b68109" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e2bd0-cb55-7842-9a52-4adc2475fc65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7780-b773-f33cb92de8f6" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e2bd0-cb55-7842-9a52-4adc2475fc65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InsuranceLinkedSecuritiesFundsMember_019e2bd0-cb55-789b-a0ff-f4e7975ec084" xlink:href="rnr-20260630.xsd#rnr_InsuranceLinkedSecuritiesFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7780-b773-f33cb92de8f6" xlink:to="loc_rnr_InsuranceLinkedSecuritiesFundsMember_019e2bd0-cb55-789b-a0ff-f4e7975ec084" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-798e-bf32-e9b3f820f425" xlink:href="rnr-20260630.xsd#rnr_CatastropheBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7780-b773-f33cb92de8f6" xlink:to="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-798e-bf32-e9b3f820f425" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e2bd0-cb55-7861-a336-58f9d6eaba10" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:to="loc_dei_LegalEntityAxis_019e2bd0-cb55-7861-a336-58f9d6eaba10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb55-7861-a336-58f9d6eaba10_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb55-7861-a336-58f9d6eaba10" xlink:to="loc_dei_EntityDomain_019e2bd0-cb55-7861-a336-58f9d6eaba10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb55-70a1-bcc8-d5b6db0940d6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb55-7861-a336-58f9d6eaba10" xlink:to="loc_dei_EntityDomain_019e2bd0-cb55-70a1-bcc8-d5b6db0940d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb55-7f38-ba79-f1e2f2a6198f" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciUCITSFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-70a1-bcc8-d5b6db0940d6" xlink:to="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb55-7f38-ba79-f1e2f2a6198f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e2bd0-cb55-770f-bbfa-5f35cc8696f1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:to="loc_srt_CounterpartyNameAxis_019e2bd0-cb55-770f-bbfa-5f35cc8696f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-770f-bbfa-5f35cc8696f1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e2bd0-cb55-770f-bbfa-5f35cc8696f1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-770f-bbfa-5f35cc8696f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-7212-a12f-feecedcc7d16" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e2bd0-cb55-770f-bbfa-5f35cc8696f1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-7212-a12f-feecedcc7d16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ThirdPartyInvestorsMember_019e2bd0-cb55-7343-82f8-115faf978289" xlink:href="rnr-20260630.xsd#rnr_ThirdPartyInvestorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-7212-a12f-feecedcc7d16" xlink:to="loc_rnr_ThirdPartyInvestorsMember_019e2bd0-cb55-7343-82f8-115faf978289" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReHoldingsLtd.Member_019e2bd0-cb55-7448-9778-c604701403fe" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-7212-a12f-feecedcc7d16" xlink:to="loc_rnr_RenaissanceReHoldingsLtd.Member_019e2bd0-cb55-7448-9778-c604701403fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb55-7640-92e7-97aa0c2f844e" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciUCITSFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb55-7212-a12f-feecedcc7d16" xlink:to="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb55-7640-92e7-97aa0c2f844e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7ca7-9cc0-d97ada955837" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7ca7-9cc0-d97ada955837" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7ca7-9cc0-d97ada955837_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7ca7-9cc0-d97ada955837" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7ca7-9cc0-d97ada955837_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-74bc-aff4-b062eedda5bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7ca7-9cc0-d97ada955837" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-74bc-aff4-b062eedda5bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e2bd0-cb55-7baa-a686-c3471f08a0c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-74bc-aff4-b062eedda5bb" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e2bd0-cb55-7baa-a686-c3471f08a0c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019e2bd0-cb55-779b-b152-1736d51b0ef7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7eea-99e5-810606f39b5d" xlink:to="loc_srt_OwnershipAxis_019e2bd0-cb55-779b-b152-1736d51b0ef7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e2bd0-cb55-779b-b152-1736d51b0ef7_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019e2bd0-cb55-779b-b152-1736d51b0ef7" xlink:to="loc_srt_OwnershipDomain_019e2bd0-cb55-779b-b152-1736d51b0ef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e2bd0-cb55-773c-a14a-d7108b26c1e6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019e2bd0-cb55-779b-b152-1736d51b0ef7" xlink:to="loc_srt_OwnershipDomain_019e2bd0-cb55-773c-a14a-d7108b26c1e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb55-770d-ad92-d0869493e682" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciUCITSFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e2bd0-cb55-773c-a14a-d7108b26c1e6" xlink:to="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb55-770d-ad92-d0869493e682" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldInTrust_019e2bd0-cb55-7218-a294-142569b3dc93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsHeldInTrust"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_AssetsHeldInTrust_019e2bd0-cb55-7218-a294-142569b3dc93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldByInsuranceRegulators_019e2bd0-cb55-711e-ba88-2c4101477777" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsHeldByInsuranceRegulators"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_AssetsHeldByInsuranceRegulators_019e2bd0-cb55-711e-ba88-2c4101477777" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuritiesForReverseRepurchaseAgreements_019e2bd0-cb55-74eb-a4a6-5b08de9f7776" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuritiesForReverseRepurchaseAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_SecuritiesForReverseRepurchaseAgreements_019e2bd0-cb55-74eb-a4a6-5b08de9f7776" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_019e2bd0-cb55-7863-9293-8a59794172c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_019e2bd0-cb55-7863-9293-8a59794172c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NoncontrollingInterestRedemptionNoticeRequiredNumberOfBusinessDays_019e2bd0-cb55-7381-a383-c9a4a1a143f0" xlink:href="rnr-20260630.xsd#rnr_NoncontrollingInterestRedemptionNoticeRequiredNumberOfBusinessDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_rnr_NoncontrollingInterestRedemptionNoticeRequiredNumberOfBusinessDays_019e2bd0-cb55-7381-a383-c9a4a1a143f0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019e2bd0-cb55-78ac-9cd4-ad8fed64a810" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019e2bd0-cb55-78ac-9cd4-ad8fed64a810" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019f5c79-3b6a-710b-8bf9-ef0fdab4c155" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019f5c79-3b6a-710b-8bf9-ef0fdab4c155" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuanceTransferInKindFromExistingInvestors_019e2bd0-cb55-73e2-9e0a-45dae51e4d5e" xlink:href="rnr-20260630.xsd#rnr_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuanceTransferInKindFromExistingInvestors"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_rnr_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuanceTransferInKindFromExistingInvestors_019e2bd0-cb55-73e2-9e0a-45dae51e4d5e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e2bd0-cb55-73c3-8860-4bab3254e004" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_NetIncomeLoss_019e2bd0-cb55-73c3-8860-4bab3254e004" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestment_019e2bd0-cb55-7656-9977-0ad8721bcfc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AlternativeInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_AlternativeInvestment_019e2bd0-cb55-7656-9977-0ad8721bcfc9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019e2bd0-cb55-7638-9c00-ffd16ea3efda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019e2bd0-cb55-7638-9c00-ffd16ea3efda" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InvestmentOwnedMaturityPeriod_019e2bd0-cb55-7edd-87e5-d337d19eb4ff" xlink:href="rnr-20260630.xsd#rnr_InvestmentOwnedMaturityPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-74ac-8e74-0f660e18cd4e" xlink:to="loc_rnr_InvestmentOwnedMaturityPeriod_019e2bd0-cb55-7edd-87e5-d337d19eb4ff" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofOtherInvestmentsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofOtherInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofOtherInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7aab-af66-0f2caf703349" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-706b-a379-6b8f9bd9b782" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7aab-af66-0f2caf703349" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-706b-a379-6b8f9bd9b782" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7feb-a153-6cb7fc0fa67a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-706b-a379-6b8f9bd9b782" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7feb-a153-6cb7fc0fa67a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7feb-a153-6cb7fc0fa67a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7feb-a153-6cb7fc0fa67a" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7feb-a153-6cb7fc0fa67a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7370-be84-66337011735d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7feb-a153-6cb7fc0fa67a" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7370-be84-66337011735d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:href="rnr-20260630.xsd#rnr_SeniorSecuredBankLoanFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7370-be84-66337011735d" xlink:to="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PrivateCreditFundsMember_019e2bd0-cb55-7723-a70f-b4b731ebff7c" xlink:href="rnr-20260630.xsd#rnr_PrivateCreditFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:to="loc_rnr_PrivateCreditFundsMember_019e2bd0-cb55-7723-a70f-b4b731ebff7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e2bd0-cb55-73c1-a08d-1f1598f0f7bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e2bd0-cb55-73c1-a08d-1f1598f0f7bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MultiStrategyFundsMember_019e2bd0-cb55-7699-95dd-75d4cc6e5d00" xlink:href="rnr-20260630.xsd#rnr_MultiStrategyFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:to="loc_rnr_MultiStrategyFundsMember_019e2bd0-cb55-7699-95dd-75d4cc6e5d00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InsuranceLinkedSecuritiesFundsMember_019e2bd0-cb55-73e8-9ced-af269ed48bb5" xlink:href="rnr-20260630.xsd#rnr_InsuranceLinkedSecuritiesFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:to="loc_rnr_InsuranceLinkedSecuritiesFundsMember_019e2bd0-cb55-73e8-9ced-af269ed48bb5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityFundsMember_019e2bd0-cb55-742b-8bef-e46f5e82ab56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_SeniorSecuredBankLoanFundsMember_019e2bd0-cb55-7933-b00c-50653037a5ba" xlink:to="loc_us-gaap_EquityFundsMember_019e2bd0-cb55-742b-8bef-e46f5e82ab56" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7f3b-a6e5-d27a2c7beebb" xlink:href="rnr-20260630.xsd#rnr_CatastropheBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7370-be84-66337011735d" xlink:to="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7f3b-a6e5-d27a2c7beebb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7212-ab81-74434b97ec75" xlink:href="rnr-20260630.xsd#rnr_DirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7370-be84-66337011735d" xlink:to="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7212-ab81-74434b97ec75" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_019e2bd0-cb55-7284-b4b0-25367b49cea0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-7aab-af66-0f2caf703349" xlink:to="loc_us-gaap_OtherLongTermInvestments_019e2bd0-cb55-7284-b4b0-25367b49cea0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofVariableInterestEntitiesDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofVariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofVariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-763c-acb4-434f8c3d98de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7b24-8b14-ee46295abb5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-763c-acb4-434f8c3d98de" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7b24-8b14-ee46295abb5b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7742-862c-870542da5e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_019e2bd0-cb55-7b24-8b14-ee46295abb5b" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7742-862c-870542da5e2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7742-862c-870542da5e2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7742-862c-870542da5e2b" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7742-862c-870542da5e2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7419-8e0d-59997a4ddf5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7742-862c-870542da5e2b" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7419-8e0d-59997a4ddf5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_OtherInvestmentsFundedCommitmentsMember_019e2bd0-cb55-753e-8fc2-86db3e39da07" xlink:href="rnr-20260630.xsd#rnr_OtherInvestmentsFundedCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7419-8e0d-59997a4ddf5d" xlink:to="loc_rnr_OtherInvestmentsFundedCommitmentsMember_019e2bd0-cb55-753e-8fc2-86db3e39da07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_OtherInvestmentsUnfundedCommitmentsMember_019e2bd0-cb55-7306-b982-79d7ff967e22" xlink:href="rnr-20260630.xsd#rnr_OtherInvestmentsUnfundedCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7419-8e0d-59997a4ddf5d" xlink:to="loc_rnr_OtherInvestmentsUnfundedCommitmentsMember_019e2bd0-cb55-7306-b982-79d7ff967e22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019e2bd0-cb55-7d52-91e5-468540bc3713" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019e2bd0-cb55-763c-acb4-434f8c3d98de" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019e2bd0-cb55-7d52-91e5-468540bc3713" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofComponentsofNetInvestmentIncomeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofComponentsofNetInvestmentIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofComponentsofNetInvestmentIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_019e2bd0-cb55-74db-b24c-6830b227cd55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_019e2bd0-cb55-73c2-9462-783996aa9f9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_019e2bd0-cb55-74db-b24c-6830b227cd55" xlink:to="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_019e2bd0-cb55-73c2-9462-783996aa9f9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ce-b56c-eb0e9b473dd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_019e2bd0-cb55-73c2-9462-783996aa9f9a" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ce-b56c-eb0e9b473dd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-71ce-b56c-eb0e9b473dd1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ce-b56c-eb0e9b473dd1" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-71ce-b56c-eb0e9b473dd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ce-b56c-eb0e9b473dd1" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedMaturitiesMember_019e2bd0-cb55-731c-96da-afe28ff193d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedMaturitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_us-gaap_FixedMaturitiesMember_019e2bd0-cb55-731c-96da-afe28ff193d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_019e2bd0-cb55-7762-93e1-bf187539330d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_019e2bd0-cb55-7762-93e1-bf187539330d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeFundsMember_019e2bd0-cb55-7a49-bb09-2bb379dcfdea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_us-gaap_FixedIncomeFundsMember_019e2bd0-cb55-7a49-bb09-2bb379dcfdea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-cb55-7dca-8387-047ba2ec4e9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-cb55-7dca-8387-047ba2ec4e9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7ea2-9053-32ef15e11945" xlink:href="rnr-20260630.xsd#rnr_CatastropheBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7ea2-9053-32ef15e11945" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FundAndDirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7799-b712-53367c5c1051" xlink:href="rnr-20260630.xsd#rnr_FundAndDirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_rnr_FundAndDirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7799-b712-53367c5c1051" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_019e2bd0-cb55-72a9-b8a7-c76e7ff94589" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-72ec-ab86-ecee22e6f64f" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_019e2bd0-cb55-72a9-b8a7-c76e7ff94589" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_019e2bd0-cb55-73e2-8eb4-cd30e09446f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_019e2bd0-cb55-74db-b24c-6830b227cd55" xlink:to="loc_us-gaap_GrossInvestmentIncomeOperating_019e2bd0-cb55-73e2-8eb4-cd30e09446f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_019e2bd0-cb55-72b6-ad03-bdb2f450cb3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_019e2bd0-cb55-74db-b24c-6830b227cd55" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_019e2bd0-cb55-72b6-ad03-bdb2f450cb3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_019e2bd0-cb55-70d1-908e-693c8099f50d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_019e2bd0-cb55-74db-b24c-6830b227cd55" xlink:to="loc_us-gaap_NetInvestmentIncome_019e2bd0-cb55-70d1-908e-693c8099f50d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofNetRealizedandUnrealizedGainsLossesonInvestmentsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofNetRealizedandUnrealizedGainsLossesonInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofNetRealizedandUnrealizedGainsLossesonInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7501-a7f5-0c3240ff3135" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGainLossOnInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:to="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7501-a7f5-0c3240ff3135" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7dad-82bc-70537c6589bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7501-a7f5-0c3240ff3135" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7dad-82bc-70537c6589bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7dad-82bc-70537c6589bb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7dad-82bc-70537c6589bb" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7dad-82bc-70537c6589bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-7dad-82bc-70537c6589bb" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedMaturitiesMember_019e2bd0-cb55-7d62-a1e7-b7f393af6440" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedMaturitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:to="loc_us-gaap_FixedMaturitiesMember_019e2bd0-cb55-7d62-a1e7-b7f393af6440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeMember_019e2bd0-cb55-7ce3-b66e-ad6e04ee5963" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:to="loc_us-gaap_DerivativeMember_019e2bd0-cb55-7ce3-b66e-ad6e04ee5963" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019e2bd0-cb55-7601-bfcb-704b475af0c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:to="loc_us-gaap_EquitySecuritiesMember_019e2bd0-cb55-7601-bfcb-704b475af0c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7232-a729-2bb3fa3eb274" xlink:href="rnr-20260630.xsd#rnr_CatastropheBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:to="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7232-a729-2bb3fa3eb274" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FundAndDirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7b68-8efb-b06ed91ee248" xlink:href="rnr-20260630.xsd#rnr_FundAndDirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:to="loc_rnr_FundAndDirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7b68-8efb-b06ed91ee248" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityMember_019e2bd0-cb55-7ac6-adec-5df2bb4e118a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7182-a055-af1dd927ccfd" xlink:to="loc_us-gaap_CommodityMember_019e2bd0-cb55-7ac6-adec-5df2bb4e118a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cb55-738b-9105-1dfaf9bb580c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7501-a7f5-0c3240ff3135" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cb55-738b-9105-1dfaf9bb580c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cb55-738b-9105-1dfaf9bb580c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cb55-738b-9105-1dfaf9bb580c" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cb55-738b-9105-1dfaf9bb580c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cb55-7f50-ae7a-e4aab9e30f86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cb55-738b-9105-1dfaf9bb580c" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cb55-7f50-ae7a-e4aab9e30f86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e2bd0-cb55-74fc-9930-b12242f53aee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cb55-7f50-ae7a-e4aab9e30f86" xlink:to="loc_us-gaap_NondesignatedMember_019e2bd0-cb55-74fc-9930-b12242f53aee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingGainLoss_019e2bd0-cb55-7b32-bfe1-169dded2dd0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:to="loc_us-gaap_DebtSecuritiesTradingGainLoss_019e2bd0-cb55-7b32-bfe1-169dded2dd0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsInvestmentPortfolioGainLoss_019e2bd0-cb55-7f1d-8305-05f15ee6e6db" xlink:href="rnr-20260630.xsd#rnr_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsInvestmentPortfolioGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:to="loc_rnr_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsInvestmentPortfolioGainLoss_019e2bd0-cb55-7f1d-8305-05f15ee6e6db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiGainLoss_019e2bd0-cb55-7734-b4da-63250a05bc4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:to="loc_us-gaap_EquitySecuritiesFvNiGainLoss_019e2bd0-cb55-7734-b4da-63250a05bc4d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesGainLoss_019e2bd0-cb55-7963-a774-ad500e09b77f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:to="loc_us-gaap_DebtSecuritiesGainLoss_019e2bd0-cb55-7963-a774-ad500e09b77f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingGainsLosses_019e2bd0-cb55-7b6f-b289-cbe1788f3036" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-70a4-b834-81db9bcf4f29" xlink:to="loc_us-gaap_NonoperatingGainsLosses_019e2bd0-cb55-7b6f-b289-cbe1788f3036" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/INVESTMENTSScheduleofNetRealizedandUnrealizedGainsLossesonFixedMaturityInvestmentsTradingandEquityInvestmentsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#INVESTMENTSScheduleofNetRealizedandUnrealizedGainsLossesonFixedMaturityInvestmentsTradingandEquityInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/INVESTMENTSScheduleofNetRealizedandUnrealizedGainsLossesonFixedMaturityInvestmentsTradingandEquityInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-7a37-9e6c-022996cc0ba9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7983-b382-12466b940f6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGainLossOnInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-7a37-9e6c-022996cc0ba9" xlink:to="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7983-b382-12466b940f6f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ad-8bf2-23a46eb8eefe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsTable_019e2bd0-cb55-7983-b382-12466b940f6f" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ad-8bf2-23a46eb8eefe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-71ad-8bf2-23a46eb8eefe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ad-8bf2-23a46eb8eefe" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-71ad-8bf2-23a46eb8eefe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7350-a141-2ed685eb8c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e2bd0-cb55-71ad-8bf2-23a46eb8eefe" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7350-a141-2ed685eb8c1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedMaturitiesMember_019e2bd0-cb55-7f2d-843b-d93a42b1764f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedMaturitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7350-a141-2ed685eb8c1b" xlink:to="loc_us-gaap_FixedMaturitiesMember_019e2bd0-cb55-7f2d-843b-d93a42b1764f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019e2bd0-cb55-7d8f-9931-be106a723a90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e2bd0-cb55-7350-a141-2ed685eb8c1b" xlink:to="loc_us-gaap_EquitySecuritiesMember_019e2bd0-cb55-7d8f-9931-be106a723a90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract_019e2bd0-cb55-7cde-bed3-0817f77aff01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-7a37-9e6c-022996cc0ba9" xlink:to="loc_us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract_019e2bd0-cb55-7cde-bed3-0817f77aff01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingRealizedGainLoss_019e2bd0-cb55-7974-bca2-131bd000221e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract_019e2bd0-cb55-7cde-bed3-0817f77aff01" xlink:to="loc_us-gaap_DebtSecuritiesTradingRealizedGainLoss_019e2bd0-cb55-7974-bca2-131bd000221e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingUnrealizedGainLoss_019e2bd0-cb55-78df-b872-41295522f32f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract_019e2bd0-cb55-7cde-bed3-0817f77aff01" xlink:to="loc_us-gaap_DebtSecuritiesTradingUnrealizedGainLoss_019e2bd0-cb55-78df-b872-41295522f32f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingGainLoss_019e2bd0-cb55-7713-b4c5-9803559d3e00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetRealizedOrUnrealizedGainLossOnTradingSecuritiesAbstract_019e2bd0-cb55-7cde-bed3-0817f77aff01" xlink:to="loc_us-gaap_DebtSecuritiesTradingGainLoss_019e2bd0-cb55-7713-b4c5-9803559d3e00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiGainLossAbstract_019e2bd0-cb55-7944-a356-365ef6270710" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiGainLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems_019e2bd0-cb55-7a37-9e6c-022996cc0ba9" xlink:to="loc_us-gaap_EquitySecuritiesFvNiGainLossAbstract_019e2bd0-cb55-7944-a356-365ef6270710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_019e2bd0-cb55-7966-84a3-a26b3c6f084e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesFvNiGainLossAbstract_019e2bd0-cb55-7944-a356-365ef6270710" xlink:to="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_019e2bd0-cb55-7966-84a3-a26b3c6f084e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019e2bd0-cb55-7da7-96b5-ab9ae82e0d6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesFvNiGainLossAbstract_019e2bd0-cb55-7944-a356-365ef6270710" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019e2bd0-cb55-7da7-96b5-ab9ae82e0d6d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiGainLoss_019e2bd0-cb55-7e9e-89bf-5a56eb452221" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesFvNiGainLossAbstract_019e2bd0-cb55-7944-a356-365ef6270710" xlink:to="loc_us-gaap_EquitySecuritiesFvNiGainLoss_019e2bd0-cb55-7e9e-89bf-5a56eb452221" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7f64-a510-2fbab7b49458" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7f64-a510-2fbab7b49458" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7df4-ba5c-50be86ce057b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7f64-a510-2fbab7b49458" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7df4-ba5c-50be86ce057b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7df4-ba5c-50be86ce057b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7df4-ba5c-50be86ce057b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7df4-ba5c-50be86ce057b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7df4-ba5c-50be86ce057b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019e2bd0-cb55-78bc-84ad-2195d7fc55fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019e2bd0-cb55-78bc-84ad-2195d7fc55fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7337-959a-08fbb3d3345a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7337-959a-08fbb3d3345a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_019e2bd0-cb55-7d01-bfc1-c18ca17bcdb9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_019e2bd0-cb55-7d01-bfc1-c18ca17bcdb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7991-8cae-930ba61ab271" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7991-8cae-930ba61ab271" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019e2bd0-cb55-7f83-a8ba-611159f28b49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019e2bd0-cb55-7f83-a8ba-611159f28b49" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AgencySecuritiesMember_019e2bd0-cb55-7034-9181-75abf83ba6eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AgencySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_AgencySecuritiesMember_019e2bd0-cb55-7034-9181-75abf83ba6eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_019e2bd0-cb55-7677-b644-8f869e4b566d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_019e2bd0-cb55-7677-b644-8f869e4b566d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeFundsMember_019e2bd0-cb55-7878-b341-47f5ae1a5988" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_FixedIncomeFundsMember_019e2bd0-cb55-7878-b341-47f5ae1a5988" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_EquityExchangeTradedFundsMember_019e2bd0-cb55-71a8-b076-cae8a931b71e" xlink:href="rnr-20260630.xsd#rnr_EquityExchangeTradedFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_rnr_EquityExchangeTradedFundsMember_019e2bd0-cb55-71a8-b076-cae8a931b71e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-cb55-78d3-9979-944adf1b3d3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-cb55-78d3-9979-944adf1b3d3a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7bfe-bea6-194772d627ee" xlink:href="rnr-20260630.xsd#rnr_CatastropheBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_rnr_CatastropheBondsMember_019e2bd0-cb55-7bfe-bea6-194772d627ee" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7568-8c50-d7439222f80f" xlink:href="rnr-20260630.xsd#rnr_DirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7568-8c50-d7439222f80f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FundInvestmentsMember_019e2bd0-cb55-7440-8350-8818f9c8204c" xlink:href="rnr-20260630.xsd#rnr_FundInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7a5e-a1c7-62cf93cd74ad" xlink:to="loc_rnr_FundInvestmentsMember_019e2bd0-cb55-7440-8350-8818f9c8204c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e3c-a3dd-b2ceb3638284" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7f64-a510-2fbab7b49458" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e3c-a3dd-b2ceb3638284" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7e3c-a3dd-b2ceb3638284_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e3c-a3dd-b2ceb3638284" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7e3c-a3dd-b2ceb3638284_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7917-a8d2-61f5abe1a6dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e3c-a3dd-b2ceb3638284" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7917-a8d2-61f5abe1a6dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member_019e2bd0-cb55-7212-8bf6-2230f2659561" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7917-a8d2-61f5abe1a6dc" xlink:to="loc_us-gaap_FairValueInputsLevel12And3Member_019e2bd0-cb55-7212-8bf6-2230f2659561" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e2bd0-cb55-78d5-bb25-c2618304163d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_019e2bd0-cb55-7212-8bf6-2230f2659561" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e2bd0-cb55-78d5-bb25-c2618304163d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e2bd0-cb55-7943-a996-e8a803cdafb9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_019e2bd0-cb55-7212-8bf6-2230f2659561" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e2bd0-cb55-7943-a996-e8a803cdafb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7fbb-8c69-fd6b00319fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_019e2bd0-cb55-7212-8bf6-2230f2659561" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7fbb-8c69-fd6b00319fbb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e2bd0-cb55-72f6-ae6b-13664be070ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7917-a8d2-61f5abe1a6dc" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e2bd0-cb55-72f6-ae6b-13664be070ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-7920-bcab-e72a53537108" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-7920-bcab-e72a53537108" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherShortTermInvestments_019e2bd0-cb55-708e-a56c-a6ce1f827752" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_OtherShortTermInvestments_019e2bd0-cb55-708e-a56c-a6ce1f827752" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019e2bd0-cb55-7441-8fcb-2350f7b220b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019e2bd0-cb55-7441-8fcb-2350f7b220b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_019e2bd0-cb55-7d9c-b2af-4f2a4be670be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_OtherLongTermInvestments_019e2bd0-cb55-7d9c-b2af-4f2a4be670be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_AssumedAndCededReInsuranceContractsLiabilitiesFairValue_019e2bd0-cb55-7416-b114-ad2731df8c6a" xlink:href="rnr-20260630.xsd#rnr_AssumedAndCededReInsuranceContractsLiabilitiesFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_rnr_AssumedAndCededReInsuranceContractsLiabilitiesFairValue_019e2bd0-cb55-7416-b114-ad2731df8c6a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e2bd0-cb55-79fb-8431-6fd1cd168a15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_DerivativeAssets_019e2bd0-cb55-79fb-8431-6fd1cd168a15" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e2bd0-cb55-72c0-b4a7-7fa2573b7594" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_DerivativeLiabilities_019e2bd0-cb55-72c0-b4a7-7fa2573b7594" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019e2bd0-cb55-7edf-a783-f304b0b7e171" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019e2bd0-cb55-7edf-a783-f304b0b7e171" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_019e2bd0-cb55-7895-8a94-9a0fe812b8a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_019e2bd0-cb55-7895-8a94-9a0fe812b8a5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetAssetLiability_019e2bd0-cb55-7912-8ca4-8801447d0b56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetAssetLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-796c-9061-06cf90647dc2" xlink:to="loc_us-gaap_FairValueNetAssetLiability_019e2bd0-cb55-7912-8ca4-8801447d0b56" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-793c-9d90-1549b9fbaffb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-793c-9d90-1549b9fbaffb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7848-adcb-96c0261db128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7848-adcb-96c0261db128" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e2bd0-cb55-7346-82e4-69b4693fa128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e2bd0-cb55-7346-82e4-69b4693fa128" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ad-ae92-b577f4113a2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ad-ae92-b577f4113a2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7524-be9f-b0b495c2495a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7524-be9f-b0b495c2495a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestmentsMember_019f38d9-a605-7204-ad54-f3b9c0d193a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:to="loc_us-gaap_OtherLongTermInvestmentsMember_019f38d9-a605-7204-ad54-f3b9c0d193a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e2bd0-cb55-7d0f-8246-74695b39f922" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e2bd0-cb55-7d0f-8246-74695b39f922" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7228-9f94-4b0db4fe918a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7228-9f94-4b0db4fe918a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ValuationTechniqueNotDevelopedByCompanyMember_019f7fa9-fd5f-7a93-a23a-32a8f4bc8ae7" xlink:href="rnr-20260630.xsd#rnr_ValuationTechniqueNotDevelopedByCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:to="loc_rnr_ValuationTechniqueNotDevelopedByCompanyMember_019f7fa9-fd5f-7a93-a23a-32a8f4bc8ae7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019f7fa8-76f7-7295-a4e1-4bfb017cbb11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019f7fa8-76f7-7295-a4e1-4bfb017cbb11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-79c1-b8d1-823982107486" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-79c1-b8d1-823982107486" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_019e2bd0-cb55-7e14-9f72-12ed80889ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_019e2bd0-cb55-7e14-9f72-12ed80889ef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e2bd0-cb55-7b62-a281-77e82dc75d8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_LongTermDebt_019e2bd0-cb55-7b62-a281-77e82dc75d8e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e2bd0-cb55-7608-a946-4771c1c2ed06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e2bd0-cb55-7608-a946-4771c1c2ed06" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails_1" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-793c-9d90-1549b9fbaffb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-793c-9d90-1549b9fbaffb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-793c-9d90-1549b9fbaffb" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7848-adcb-96c0261db128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7848-adcb-96c0261db128" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e2bd0-cb55-7346-82e4-69b4693fa128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7055-b32d-69196e9056f1" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e2bd0-cb55-7346-82e4-69b4693fa128" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ad-ae92-b577f4113a2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ad-ae92-b577f4113a2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-74ad-ae92-b577f4113a2b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7524-be9f-b0b495c2495a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7524-be9f-b0b495c2495a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestmentsMember_019f38d9-a605-7204-ad54-f3b9c0d193a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-706f-9ffe-64ca2e94327b" xlink:to="loc_us-gaap_OtherLongTermInvestmentsMember_019f38d9-a605-7204-ad54-f3b9c0d193a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e2bd0-cb55-74eb-9ec5-55ecee803bdf" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7228-9f94-4b0db4fe918a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7228-9f94-4b0db4fe918a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019f7fa8-40ef-7228-9f94-4b0db4fe918a" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ValuationTechniqueNotDevelopedByCompanyMember_019f7fa9-fd5f-7a93-a23a-32a8f4bc8ae7" xlink:href="rnr-20260630.xsd#rnr_ValuationTechniqueNotDevelopedByCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:to="loc_rnr_ValuationTechniqueNotDevelopedByCompanyMember_019f7fa9-fd5f-7a93-a23a-32a8f4bc8ae7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019f7fa8-76f7-7295-a4e1-4bfb017cbb11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019f7fa8-40ef-7682-b56e-a486188f7c31" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019f7fa8-76f7-7295-a4e1-4bfb017cbb11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-79c1-b8d1-823982107486" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-79c1-b8d1-823982107486" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_019e2bd0-cb55-7e14-9f72-12ed80889ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_019e2bd0-cb55-7e14-9f72-12ed80889ef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e2bd0-cb55-7b62-a281-77e82dc75d8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_LongTermDebt_019e2bd0-cb55-7b62-a281-77e82dc75d8e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e2bd0-cb55-7608-a946-4771c1c2ed06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e2bd0-cb55-7f71-84a4-84d0de6ecb98" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e2bd0-cb55-7608-a946-4771c1c2ed06" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofQuantitativeInformationUsedasLevel3InputsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSScheduleofQuantitativeInformationUsedasLevel3InputsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofQuantitativeInformationUsedasLevel3InputsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e57-8d43-1f4b30cb296b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e57-8d43-1f4b30cb296b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7e57-8d43-1f4b30cb296b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e57-8d43-1f4b30cb296b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-7e57-8d43-1f4b30cb296b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-73b7-875e-ecc8463391ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-7e57-8d43-1f4b30cb296b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-73b7-875e-ecc8463391ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7c40-b892-2a02d5539b7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-73b7-875e-ecc8463391ab" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e2bd0-cb55-7c40-b892-2a02d5539b7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019e2bd0-cb55-7e86-bf38-304f382df3ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019e2bd0-cb55-7e86-bf38-304f382df3ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-7e86-bf38-304f382df3ce_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019e2bd0-cb55-7e86-bf38-304f382df3ce" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-7e86-bf38-304f382df3ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-799c-a6a0-71d90c3887ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019e2bd0-cb55-7e86-bf38-304f382df3ce" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-799c-a6a0-71d90c3887ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_019e2bd0-cb55-7aaf-bb2f-a40b9b1b9915" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-799c-a6a0-71d90c3887ac" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_019e2bd0-cb55-7aaf-bb2f-a40b9b1b9915" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MeasurementInputLiquidityMember_019e2bd0-cb55-72d4-85dc-81e969969f87" xlink:href="rnr-20260630.xsd#rnr_MeasurementInputLiquidityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-799c-a6a0-71d90c3887ac" xlink:to="loc_rnr_MeasurementInputLiquidityMember_019e2bd0-cb55-72d4-85dc-81e969969f87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MeasurementInputUndiscountedCashFlowsMember_019e2bd0-cb55-7a52-ae64-3b9a8fad01de" xlink:href="rnr-20260630.xsd#rnr_MeasurementInputUndiscountedCashFlowsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-799c-a6a0-71d90c3887ac" xlink:to="loc_rnr_MeasurementInputUndiscountedCashFlowsMember_019e2bd0-cb55-7a52-ae64-3b9a8fad01de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MeasurementInputExpectedLossRatioMember_019e2bd0-cb55-7559-bc81-0320a146f821" xlink:href="rnr-20260630.xsd#rnr_MeasurementInputExpectedLossRatioMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019e2bd0-cb55-799c-a6a0-71d90c3887ac" xlink:to="loc_rnr_MeasurementInputExpectedLossRatioMember_019e2bd0-cb55-7559-bc81-0320a146f821" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019e2bd0-cb55-7ced-8748-8089a7875c01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019e2bd0-cb55-7ced-8748-8089a7875c01" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7ced-8748-8089a7875c01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019e2bd0-cb55-7ced-8748-8089a7875c01" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7ced-8748-8089a7875c01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7c2b-9bb9-475831be6deb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019e2bd0-cb55-7ced-8748-8089a7875c01" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7c2b-9bb9-475831be6deb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019e2bd0-cb55-7804-90a3-4389e0a4e653" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7c2b-9bb9-475831be6deb" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019e2bd0-cb55-7804-90a3-4389e0a4e653" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ValuationTechniqueRecentTransactionPriceMember_019e2bd0-cb55-752f-98a7-d317cdcc1711" xlink:href="rnr-20260630.xsd#rnr_ValuationTechniqueRecentTransactionPriceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7c2b-9bb9-475831be6deb" xlink:to="loc_rnr_ValuationTechniqueRecentTransactionPriceMember_019e2bd0-cb55-752f-98a7-d317cdcc1711" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InternalValuationModelValuationTechniqueMember_019e2bd0-cb55-7a8a-a605-22c7fb4e0006" xlink:href="rnr-20260630.xsd#rnr_InternalValuationModelValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7c2b-9bb9-475831be6deb" xlink:to="loc_rnr_InternalValuationModelValuationTechniqueMember_019e2bd0-cb55-7a8a-a605-22c7fb4e0006" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ValuationApproachUnobservableInputDevelopedByTheCompanyMember_019f8574-8e5b-7f8e-bf4a-e712879a4da6" xlink:href="rnr-20260630.xsd#rnr_ValuationApproachUnobservableInputDevelopedByTheCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019e2bd0-cb55-7c2b-9bb9-475831be6deb" xlink:to="loc_rnr_ValuationApproachUnobservableInputDevelopedByTheCompanyMember_019f8574-8e5b-7f8e-bf4a-e712879a4da6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e2bd0-cb55-71ca-827e-a37189e33729" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:to="loc_srt_RangeAxis_019e2bd0-cb55-71ca-827e-a37189e33729" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e2bd0-cb55-71ca-827e-a37189e33729_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e2bd0-cb55-71ca-827e-a37189e33729" xlink:to="loc_srt_RangeMember_019e2bd0-cb55-71ca-827e-a37189e33729_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e2bd0-cb55-772c-bcb8-7b3236f8c109" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e2bd0-cb55-71ca-827e-a37189e33729" xlink:to="loc_srt_RangeMember_019e2bd0-cb55-772c-bcb8-7b3236f8c109" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_019e2bd0-cb55-7d8e-a3b0-831e12f05006" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e2bd0-cb55-772c-bcb8-7b3236f8c109" xlink:to="loc_srt_WeightedAverageMember_019e2bd0-cb55-7d8e-a3b0-831e12f05006" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7015-8ee1-792f8610448d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e2bd0-cb55-7179-8622-1a4c829e6705" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7015-8ee1-792f8610448d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7015-8ee1-792f8610448d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7015-8ee1-792f8610448d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7015-8ee1-792f8610448d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7fde-963c-a1c2a614623f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7015-8ee1-792f8610448d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7fde-963c-a1c2a614623f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7102-9966-f3f25dc9628e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7fde-963c-a1c2a614623f" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7102-9966-f3f25dc9628e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7299-b5f8-1fc19efe3de6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7fde-963c-a1c2a614623f" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7299-b5f8-1fc19efe3de6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7e20-afd7-585d81b2a4f4" xlink:href="rnr-20260630.xsd#rnr_DirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7fde-963c-a1c2a614623f" xlink:to="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7e20-afd7-585d81b2a4f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_AssumedandCededReInsuranceContractsGroupTwoMember_019e2bd0-cb55-72df-a8a2-e8d1c7bccca2" xlink:href="rnr-20260630.xsd#rnr_AssumedandCededReInsuranceContractsGroupTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7fde-963c-a1c2a614623f" xlink:to="loc_rnr_AssumedandCededReInsuranceContractsGroupTwoMember_019e2bd0-cb55-72df-a8a2-e8d1c7bccca2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-7b36-b63e-83822fa57d65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradingSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_TradingSecuritiesDebt_019e2bd0-cb55-7b36-b63e-83822fa57d65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_019e2bd0-cb55-7737-86e5-563aa93c77fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_OtherLongTermInvestments_019e2bd0-cb55-7737-86e5-563aa93c77fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019e2bd0-cb55-7bdd-a3df-fcbd2176ecd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019e2bd0-cb55-7bdd-a3df-fcbd2176ecd1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetAssetLiability_019e2bd0-cb55-796a-8acb-0d9254a1971d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetAssetLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_FairValueNetAssetLiability_019e2bd0-cb55-796a-8acb-0d9254a1971d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesTradingMeasurementInput_019e2bd0-cb55-756e-8cb2-a7f24e7cebf2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesTradingMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_DebtSecuritiesTradingMeasurementInput_019e2bd0-cb55-756e-8cb2-a7f24e7cebf2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestmentMeasurementInput_019e2bd0-cb55-77b4-a107-a307d7d6d734" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AlternativeInvestmentMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e2bd0-cb55-7096-b88f-e8cd22b3a6f1" xlink:to="loc_us-gaap_AlternativeInvestmentMeasurementInput_019e2bd0-cb55-77b4-a107-a307d7d6d734" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisUsingLevel3InputsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisUsingLevel3InputsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisUsingLevel3InputsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-76a9-8bee-0f5fb0312e65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-76a9-8bee-0f5fb0312e65" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e2bd0-cb55-7c01-bd25-c2df4a2bbd1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e2bd0-cb55-7c01-bd25-c2df4a2bbd1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7a43-acd7-dc836a4a6f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7a43-acd7-dc836a4a6f5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7646-966e-315fe53402f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7646-966e-315fe53402f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7fe9-b637-0428f965bee4" xlink:href="rnr-20260630.xsd#rnr_DirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7fe9-b637-0428f965bee4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_OtherAssetsLiabilitiesMember_019e2bd0-cb55-7299-bce9-b64b9aa43982" xlink:href="rnr-20260630.xsd#rnr_OtherAssetsLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_rnr_OtherAssetsLiabilitiesMember_019e2bd0-cb55-7299-bce9-b64b9aa43982" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-76a9-8bee-0f5fb0312e65" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019e2bd0-cb55-76d9-80e8-9b6f2c8dd841" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019e2bd0-cb55-76d9-80e8-9b6f2c8dd841" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_019e2bd0-cb55-7028-86cd-6289f9064e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_019e2bd0-cb55-7028-86cd-6289f9064e0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings_019e2bd0-cb55-7403-8558-10d06a1522d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_019e2bd0-cb55-7028-86cd-6289f9064e0d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings_019e2bd0-cb55-7403-8558-10d06a1522d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisForeignExchangeGainsLosses_019e2bd0-cb55-7749-ac47-b125cfaf41f6" xlink:href="rnr-20260630.xsd#rnr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisForeignExchangeGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_rnr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisForeignExchangeGainsLosses_019e2bd0-cb55-7749-ac47-b125cfaf41f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019e2bd0-cb55-7caa-ad52-7b556e5ce15c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019e2bd0-cb55-7caa-ad52-7b556e5ce15c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019f70f8-5eab-7416-b29d-aeb3a20a284f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019f70f8-5eab-7416-b29d-aeb3a20a284f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_019e2bd0-cb55-733e-b679-63a9ca125e94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_019e2bd0-cb55-733e-b679-63a9ca125e94" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019e2bd0-cb55-732b-8e57-549b602f2fb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisUsingLevel3InputsDetails_1" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisUsingLevel3InputsDetails_1"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisUsingLevel3InputsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-76a9-8bee-0f5fb0312e65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-76a9-8bee-0f5fb0312e65" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e2bd0-cb55-7d09-8280-7de1862a4867" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-7de6-bbe7-12f3b72b2c8b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7a43-acd7-dc836a4a6f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e2bd0-cb55-7a43-acd7-dc836a4a6f5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7646-966e-315fe53402f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e2bd0-cb55-7646-966e-315fe53402f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7fe9-b637-0428f965bee4" xlink:href="rnr-20260630.xsd#rnr_DirectPrivateEquityInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_rnr_DirectPrivateEquityInvestmentsMember_019e2bd0-cb55-7fe9-b637-0428f965bee4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_OtherAssetsLiabilitiesMember_019e2bd0-cb55-7299-bce9-b64b9aa43982" xlink:href="rnr-20260630.xsd#rnr_OtherAssetsLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-74ec-b004-6d832f4e76f7" xlink:to="loc_rnr_OtherAssetsLiabilitiesMember_019e2bd0-cb55-7299-bce9-b64b9aa43982" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e2bd0-cb55-76a9-8bee-0f5fb0312e65" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019e2bd0-cb55-76d9-80e8-9b6f2c8dd841" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019e2bd0-cb55-76d9-80e8-9b6f2c8dd841" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_019e2bd0-cb55-7028-86cd-6289f9064e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_019e2bd0-cb55-7028-86cd-6289f9064e0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings_019e2bd0-cb55-7403-8558-10d06a1522d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract_019e2bd0-cb55-7028-86cd-6289f9064e0d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings_019e2bd0-cb55-7403-8558-10d06a1522d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisForeignExchangeGainsLosses_019e2bd0-cb55-7749-ac47-b125cfaf41f6" xlink:href="rnr-20260630.xsd#rnr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisForeignExchangeGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_rnr_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisForeignExchangeGainsLosses_019e2bd0-cb55-7749-ac47-b125cfaf41f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019e2bd0-cb55-7caa-ad52-7b556e5ce15c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019e2bd0-cb55-7caa-ad52-7b556e5ce15c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019f70f8-5eab-7416-b29d-aeb3a20a284f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019f70f8-5eab-7416-b29d-aeb3a20a284f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_019e2bd0-cb55-733e-b679-63a9ca125e94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e2bd0-cb55-7cd7-ad3e-8c5ba5c8545f" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_019e2bd0-cb55-733e-b679-63a9ca125e94" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019e2bd0-cb55-732b-8e57-549b602f2fb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofOtherInvestmentsMeasuredUsingNetAssetValuationsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#FAIRVALUEMEASUREMENTSScheduleofOtherInvestmentsMeasuredUsingNetAssetValuationsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/FAIRVALUEMEASUREMENTSScheduleofOtherInvestmentsMeasuredUsingNetAssetValuationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_019e2bd0-cb55-7224-b79c-6a3400fddf4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_019e2bd0-cb55-7d7f-ab7b-9d20730f139d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_019e2bd0-cb55-7224-b79c-6a3400fddf4d" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_019e2bd0-cb55-7d7f-ab7b-9d20730f139d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-77bc-9413-da335a4aea73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_019e2bd0-cb55-7d7f-ab7b-9d20730f139d" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-77bc-9413-da335a4aea73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-77bc-9413-da335a4aea73_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-77bc-9413-da335a4aea73" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-77bc-9413-da335a4aea73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-78cd-987c-63154557cd94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e2bd0-cb55-77bc-9413-da335a4aea73" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-78cd-987c-63154557cd94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e2bd0-cb55-7fac-80ef-cc2d590c9f77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e2bd0-cb55-78cd-987c-63154557cd94" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e2bd0-cb55-7fac-80ef-cc2d590c9f77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-70e7-9f4f-d80b6f5364d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareTable_019e2bd0-cb55-7d7f-ab7b-9d20730f139d" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-70e7-9f4f-d80b6f5364d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-70e7-9f4f-d80b6f5364d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-70e7-9f4f-d80b6f5364d1" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-70e7-9f4f-d80b6f5364d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e2bd0-cb55-70e7-9f4f-d80b6f5364d1" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PrivateCreditFundsMember_019e2bd0-cb55-7385-ae26-b5abaf48519d" xlink:href="rnr-20260630.xsd#rnr_PrivateCreditFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:to="loc_rnr_PrivateCreditFundsMember_019e2bd0-cb55-7385-ae26-b5abaf48519d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e2bd0-cb55-7a95-a4d3-4ac3df0994dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e2bd0-cb55-7a95-a4d3-4ac3df0994dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MultiStrategyFundsMember_019e2bd0-cb55-7ec9-84ef-02624aa232fb" xlink:href="rnr-20260630.xsd#rnr_MultiStrategyFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:to="loc_rnr_MultiStrategyFundsMember_019e2bd0-cb55-7ec9-84ef-02624aa232fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InsuranceLinkedSecuritiesFundsMember_019e2bd0-cb55-7290-ab80-25c462610d14" xlink:href="rnr-20260630.xsd#rnr_InsuranceLinkedSecuritiesFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:to="loc_rnr_InsuranceLinkedSecuritiesFundsMember_019e2bd0-cb55-7290-ab80-25c462610d14" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityFundsMember_019e2bd0-cb55-783f-b72c-e765c4a92d32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e2bd0-cb55-7c45-a6e2-59a63f358027" xlink:to="loc_us-gaap_EquityFundsMember_019e2bd0-cb55-783f-b72c-e765c4a92d32" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestment_019e2bd0-cb55-7d32-827f-c269171c513a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AlternativeInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_019e2bd0-cb55-7224-b79c-6a3400fddf4d" xlink:to="loc_us-gaap_AlternativeInvestment_019e2bd0-cb55-7d32-827f-c269171c513a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_019e2bd0-cb55-7e86-b4e6-a86f7d6d5902" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLineItems_019e2bd0-cb55-7224-b79c-6a3400fddf4d" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_019e2bd0-cb55-7e86-b4e6-a86f7d6d5902" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/REINSURANCENarrativeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#REINSURANCENarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/REINSURANCENarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:to="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskCollateralizationAxis_019e2bd0-cb55-7c41-9cbf-b77a05f47fb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskCollateralizationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:to="loc_us-gaap_CededCreditRiskCollateralizationAxis_019e2bd0-cb55-7c41-9cbf-b77a05f47fb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskCollateralizationDomain_019e2bd0-cb55-7c41-9cbf-b77a05f47fb5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskCollateralizationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CededCreditRiskCollateralizationAxis_019e2bd0-cb55-7c41-9cbf-b77a05f47fb5" xlink:to="loc_us-gaap_CededCreditRiskCollateralizationDomain_019e2bd0-cb55-7c41-9cbf-b77a05f47fb5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskCollateralizationDomain_019e2bd0-cb55-755c-86b1-11aa81af55ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskCollateralizationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CededCreditRiskCollateralizationAxis_019e2bd0-cb55-7c41-9cbf-b77a05f47fb5" xlink:to="loc_us-gaap_CededCreditRiskCollateralizationDomain_019e2bd0-cb55-755c-86b1-11aa81af55ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskSecuredMember_019e2bd0-cb55-7dc3-a406-435cfea038b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskSecuredMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskCollateralizationDomain_019e2bd0-cb55-755c-86b1-11aa81af55ce" xlink:to="loc_us-gaap_CededCreditRiskSecuredMember_019e2bd0-cb55-7dc3-a406-435cfea038b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskUnsecuredMember_019e2bd0-cb55-78af-87e2-c94734e5dc4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededCreditRiskUnsecuredMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskCollateralizationDomain_019e2bd0-cb55-755c-86b1-11aa81af55ce" xlink:to="loc_us-gaap_CededCreditRiskUnsecuredMember_019e2bd0-cb55-78af-87e2-c94734e5dc4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e2bd0-cb55-7fb6-84f1-b2269b05722a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e2bd0-cb55-7fb6-84f1-b2269b05722a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e2bd0-cb55-7fb6-84f1-b2269b05722a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e2bd0-cb55-7fb6-84f1-b2269b05722a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e2bd0-cb55-7fb6-84f1-b2269b05722a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e2bd0-cb55-7ca7-84dd-d65dda06e2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e2bd0-cb55-7fb6-84f1-b2269b05722a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e2bd0-cb55-7ca7-84dd-d65dda06e2fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverableMember_019e2bd0-cb55-759a-bcf0-15ddc12b12f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReinsuranceRecoverableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e2bd0-cb55-7ca7-84dd-d65dda06e2fc" xlink:to="loc_us-gaap_ReinsuranceRecoverableMember_019e2bd0-cb55-759a-bcf0-15ddc12b12f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForReinsuranceRecoverableMember_019e2bd0-cb55-7eaa-a375-2355c485799d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForReinsuranceRecoverableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e2bd0-cb55-7ca7-84dd-d65dda06e2fc" xlink:to="loc_us-gaap_AllowanceForReinsuranceRecoverableMember_019e2bd0-cb55-7eaa-a375-2355c485799d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019e2bd0-cb55-726d-a1fa-e90a028ec8ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019e2bd0-cb55-726d-a1fa-e90a028ec8ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019e2bd0-cb55-726d-a1fa-e90a028ec8ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019e2bd0-cb55-726d-a1fa-e90a028ec8ba" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019e2bd0-cb55-726d-a1fa-e90a028ec8ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019e2bd0-cb55-785a-9edf-2fdfaac159db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019e2bd0-cb55-726d-a1fa-e90a028ec8ba" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019e2bd0-cb55-785a-9edf-2fdfaac159db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsurerConcentrationRiskMember_019e2bd0-cb55-7e77-8230-dd712a5933a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReinsurerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019e2bd0-cb55-785a-9edf-2fdfaac159db" xlink:to="loc_us-gaap_ReinsurerConcentrationRiskMember_019e2bd0-cb55-7e77-8230-dd712a5933a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019e2bd0-cb55-71b0-9993-02b09a3d4cc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019e2bd0-cb55-785a-9edf-2fdfaac159db" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019e2bd0-cb55-71b0-9993-02b09a3d4cc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CreditRatingStandardPoorsAxis_019e2bd0-cb55-737d-851e-7c10f673d3b1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CreditRatingStandardPoorsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:to="loc_srt_CreditRatingStandardPoorsAxis_019e2bd0-cb55-737d-851e-7c10f673d3b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ExternalCreditRatingStandardPoorsMember_019e2bd0-cb55-737d-851e-7c10f673d3b1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ExternalCreditRatingStandardPoorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CreditRatingStandardPoorsAxis_019e2bd0-cb55-737d-851e-7c10f673d3b1" xlink:to="loc_srt_ExternalCreditRatingStandardPoorsMember_019e2bd0-cb55-737d-851e-7c10f673d3b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ExternalCreditRatingStandardPoorsMember_019e2bd0-cb55-7856-93d8-ac889688ee5d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ExternalCreditRatingStandardPoorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CreditRatingStandardPoorsAxis_019e2bd0-cb55-737d-851e-7c10f673d3b1" xlink:to="loc_srt_ExternalCreditRatingStandardPoorsMember_019e2bd0-cb55-7856-93d8-ac889688ee5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StandardPoorsAMinusRatingMember_019e2bd0-cb55-73bf-991c-1048971b25a2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StandardPoorsAMinusRatingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ExternalCreditRatingStandardPoorsMember_019e2bd0-cb55-7856-93d8-ac889688ee5d" xlink:to="loc_srt_StandardPoorsAMinusRatingMember_019e2bd0-cb55-73bf-991c-1048971b25a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StandardPoorsBBBPlusRatingMember_019e2bd0-cb55-7181-b547-0b84cc8ce951" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StandardPoorsBBBPlusRatingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ExternalCreditRatingStandardPoorsMember_019e2bd0-cb55-7856-93d8-ac889688ee5d" xlink:to="loc_srt_StandardPoorsBBBPlusRatingMember_019e2bd0-cb55-7181-b547-0b84cc8ce951" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019e2bd0-cb55-7099-aa3e-5af1b0aef52b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_019e2bd0-cb55-77a4-b6e0-e352e5331770" xlink:to="loc_srt_MajorCustomersAxis_019e2bd0-cb55-7099-aa3e-5af1b0aef52b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7099-aa3e-5af1b0aef52b_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019e2bd0-cb55-7099-aa3e-5af1b0aef52b" xlink:to="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7099-aa3e-5af1b0aef52b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7a62-a79c-84a589337911" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019e2bd0-cb55-7099-aa3e-5af1b0aef52b" xlink:to="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7a62-a79c-84a589337911" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CustomerOneMember_019e2bd0-cb55-75f9-9257-d77e5923560d" xlink:href="rnr-20260630.xsd#rnr_CustomerOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7a62-a79c-84a589337911" xlink:to="loc_rnr_CustomerOneMember_019e2bd0-cb55-75f9-9257-d77e5923560d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CustomerTwoMember_019e2bd0-cb55-74a7-93f8-b1b23081375b" xlink:href="rnr-20260630.xsd#rnr_CustomerTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7a62-a79c-84a589337911" xlink:to="loc_rnr_CustomerTwoMember_019e2bd0-cb55-74a7-93f8-b1b23081375b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CustomerThreeMember_019e2bd0-cb55-79bd-ae2e-2f3fd32befcc" xlink:href="rnr-20260630.xsd#rnr_CustomerThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019e2bd0-cb55-7a62-a79c-84a589337911" xlink:to="loc_rnr_CustomerThreeMember_019e2bd0-cb55-79bd-ae2e-2f3fd32befcc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsReceivableAtCarryingValue_019e2bd0-cb55-7132-ab4d-265a716eb9a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsReceivableAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:to="loc_us-gaap_PremiumsReceivableAtCarryingValue_019e2bd0-cb55-7132-ab4d-265a716eb9a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_019e2bd0-cb55-7e29-b352-07c665d50826" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:to="loc_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_019e2bd0-cb55-7e29-b352-07c665d50826" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverables_019e2bd0-cb55-74bc-ad2e-6b155ab377a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReinsuranceRecoverables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:to="loc_us-gaap_ReinsuranceRecoverables_019e2bd0-cb55-74bc-ad2e-6b155ab377a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019e2bd0-cb55-78d8-ad91-fc0d62636ddb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019e2bd0-cb55-78d8-ad91-fc0d62636ddb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverablesAllowance_019e2bd0-cb55-7b9a-9ff3-b19f8a587b77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReinsuranceRecoverablesAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskLineItems_019e2bd0-cb55-7a2b-8642-48494c60aa58" xlink:to="loc_us-gaap_ReinsuranceRecoverablesAllowance_019e2bd0-cb55-7b9a-9ff3-b19f8a587b77" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/RESERVEFORCLAIMSANDCLAIMEXPENSESScheduleofReserveforClaimsandClaimExpensesbySegmentDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#RESERVEFORCLAIMSANDCLAIMEXPENSESScheduleofReserveforClaimsandClaimExpensesbySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/RESERVEFORCLAIMSANDCLAIMEXPENSESScheduleofReserveforClaimsandClaimExpensesbySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_019e2bd0-cb55-76fe-85ae-ce406df9d1ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_019e2bd0-cb55-794f-9fa7-c742cf76545c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_019e2bd0-cb55-76fe-85ae-ce406df9d1ca" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_019e2bd0-cb55-794f-9fa7-c742cf76545c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7ecd-a2fb-6c5bdbcf5294" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_019e2bd0-cb55-794f-9fa7-c742cf76545c" xlink:to="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7ecd-a2fb-6c5bdbcf5294" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7ecd-a2fb-6c5bdbcf5294_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7ecd-a2fb-6c5bdbcf5294" xlink:to="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7ecd-a2fb-6c5bdbcf5294_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7be9-8feb-9592a719c2be" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7ecd-a2fb-6c5bdbcf5294" xlink:to="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7be9-8feb-9592a719c2be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e2bd0-cb55-772c-9158-95ce5c965dda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7be9-8feb-9592a719c2be" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e2bd0-cb55-772c-9158-95ce5c965dda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7f5f-92b4-67efd4998003" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_019e2bd0-cb55-794f-9fa7-c742cf76545c" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7f5f-92b4-67efd4998003" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7f5f-92b4-67efd4998003_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7f5f-92b4-67efd4998003" xlink:to="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7f5f-92b4-67efd4998003_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7306-ba3d-8de4082f5a2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7f5f-92b4-67efd4998003" xlink:to="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7306-ba3d-8de4082f5a2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PropertySegmentMember_019e2bd0-cb55-77cd-a9f7-4737d0b32c8f" xlink:href="rnr-20260630.xsd#rnr_PropertySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7306-ba3d-8de4082f5a2e" xlink:to="loc_rnr_PropertySegmentMember_019e2bd0-cb55-77cd-a9f7-4737d0b32c8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CasualtyandSpecialtySegmentMember_019e2bd0-cb55-7376-b03f-bc2eea32db6e" xlink:href="rnr-20260630.xsd#rnr_CasualtyandSpecialtySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7306-ba3d-8de4082f5a2e" xlink:to="loc_rnr_CasualtyandSpecialtySegmentMember_019e2bd0-cb55-7376-b03f-bc2eea32db6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount_019e2bd0-cb55-78a2-8495-bd4c4cf3c807" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_019e2bd0-cb55-76fe-85ae-ce406df9d1ca" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount_019e2bd0-cb55-78a2-8495-bd4c4cf3c807" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount_019e2bd0-cb55-7558-ba73-7665318aab1d" xlink:href="rnr-20260630.xsd#rnr_LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_019e2bd0-cb55-76fe-85ae-ce406df9d1ca" xlink:to="loc_rnr_LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount_019e2bd0-cb55-7558-ba73-7665318aab1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount_019e2bd0-cb55-74a1-9226-4a6066025fd2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_019e2bd0-cb55-76fe-85ae-ce406df9d1ca" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount_019e2bd0-cb55-74a1-9226-4a6066025fd2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e2bd0-cb55-7527-9cb0-1c8a55fa3ba4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_019e2bd0-cb55-76fe-85ae-ce406df9d1ca" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e2bd0-cb55-7527-9cb0-1c8a55fa3ba4" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/RESERVEFORCLAIMSANDCLAIMEXPENSESScheduleofPriorYearDevelopmentoftheReserveforNetClaimsandClaimExpensesDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#RESERVEFORCLAIMSANDCLAIMEXPENSESScheduleofPriorYearDevelopmentoftheReserveforNetClaimsandClaimExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/RESERVEFORCLAIMSANDCLAIMEXPENSESScheduleofPriorYearDevelopmentoftheReserveforNetClaimsandClaimExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019e2bd0-cb55-7071-bcfb-d2774e9b3bfc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForCatastropheClaimsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsTable_019e2bd0-cb55-73d3-b838-ec1006727d64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForCatastropheClaimsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019e2bd0-cb55-7071-bcfb-d2774e9b3bfc" xlink:to="loc_us-gaap_LiabilityForCatastropheClaimsTable_019e2bd0-cb55-73d3-b838-ec1006727d64" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7573-b652-6700f022009d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsTable_019e2bd0-cb55-73d3-b838-ec1006727d64" xlink:to="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7573-b652-6700f022009d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7573-b652-6700f022009d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7573-b652-6700f022009d" xlink:to="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-7573-b652-6700f022009d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-719a-8747-8e0063884ed2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e2bd0-cb55-7573-b652-6700f022009d" xlink:to="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-719a-8747-8e0063884ed2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e2bd0-cb55-75b5-9621-5fa5641b8b23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e2bd0-cb55-719a-8747-8e0063884ed2" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e2bd0-cb55-75b5-9621-5fa5641b8b23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7ee4-8622-e2bb1b60f736" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsTable_019e2bd0-cb55-73d3-b838-ec1006727d64" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7ee4-8622-e2bb1b60f736" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7ee4-8622-e2bb1b60f736_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7ee4-8622-e2bb1b60f736" xlink:to="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7ee4-8622-e2bb1b60f736_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7a2f-9ed3-0dc56a658a11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cb55-7ee4-8622-e2bb1b60f736" xlink:to="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7a2f-9ed3-0dc56a658a11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PropertySegmentMember_019e2bd0-cb55-7347-ac3e-1d42122f8b04" xlink:href="rnr-20260630.xsd#rnr_PropertySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7a2f-9ed3-0dc56a658a11" xlink:to="loc_rnr_PropertySegmentMember_019e2bd0-cb55-7347-ac3e-1d42122f8b04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CasualtyandSpecialtySegmentMember_019e2bd0-cb55-768f-85bd-23fac7f2d79c" xlink:href="rnr-20260630.xsd#rnr_CasualtyandSpecialtySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e2bd0-cb55-7a2f-9ed3-0dc56a658a11" xlink:to="loc_rnr_CasualtyandSpecialtySegmentMember_019e2bd0-cb55-768f-85bd-23fac7f2d79c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019e2bd0-cb55-737d-9d12-2f51eb42175f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsTable_019e2bd0-cb55-73d3-b838-ec1006727d64" xlink:to="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019e2bd0-cb55-737d-9d12-2f51eb42175f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-737d-9d12-2f51eb42175f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CatastrophicEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019e2bd0-cb55-737d-9d12-2f51eb42175f" xlink:to="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-737d-9d12-2f51eb42175f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-74dd-9238-b81adf91108d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CatastrophicEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019e2bd0-cb55-737d-9d12-2f51eb42175f" xlink:to="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-74dd-9238-b81adf91108d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:href="rnr-20260630.xsd#rnr_LargeCatastropheEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-74dd-9238-b81adf91108d" xlink:to="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2025LargeLossEventsMember_019e2bd0-cb55-77ae-a023-841cf3478966" xlink:href="rnr-20260630.xsd#rnr_A2025LargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2025LargeLossEventsMember_019e2bd0-cb55-77ae-a023-841cf3478966" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2024LargeLossEventsMember_019e2bd0-cb55-7a38-8a8d-6546d2033a5a" xlink:href="rnr-20260630.xsd#rnr_A2024LargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2024LargeLossEventsMember_019e2bd0-cb55-7a38-8a8d-6546d2033a5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2023LargeLossEventsMember_019e2bd0-cb55-7e11-adbb-0ef8b3e3732a" xlink:href="rnr-20260630.xsd#rnr_A2023LargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2023LargeLossEventsMember_019e2bd0-cb55-7e11-adbb-0ef8b3e3732a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2022WeatherRelatedLargeLossesMember_019e2bd0-cb55-7ef8-b6b6-81d4fc9e5e35" xlink:href="rnr-20260630.xsd#rnr_A2022WeatherRelatedLargeLossesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2022WeatherRelatedLargeLossesMember_019e2bd0-cb55-7ef8-b6b6-81d4fc9e5e35" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2021WeatherRelatedLargeLossesMember_019e2bd0-cb55-746d-83a1-ed9abd3d0e20" xlink:href="rnr-20260630.xsd#rnr_A2021WeatherRelatedLargeLossesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2021WeatherRelatedLargeLossesMember_019e2bd0-cb55-746d-83a1-ed9abd3d0e20" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2020WeatherRelatedLargeLossEventsMember_019e2bd0-cb55-7962-b079-aa3fde8ce651" xlink:href="rnr-20260630.xsd#rnr_A2020WeatherRelatedLargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2020WeatherRelatedLargeLossEventsMember_019e2bd0-cb55-7962-b079-aa3fde8ce651" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2019LargeLossEventsMember_019e2bd0-cb55-7112-b724-6f1de650718a" xlink:href="rnr-20260630.xsd#rnr_A2019LargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2019LargeLossEventsMember_019e2bd0-cb55-7112-b724-6f1de650718a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2018LargeLossEventsMember_019e2bd0-cb55-73f1-b23f-1ce8819cb374" xlink:href="rnr-20260630.xsd#rnr_A2018LargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2018LargeLossEventsMember_019e2bd0-cb55-73f1-b23f-1ce8819cb374" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A2017LargeLossEventsMember_019e2bd0-cb55-722a-90c8-a20ce7870ddd" xlink:href="rnr-20260630.xsd#rnr_A2017LargeLossEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_LargeCatastropheEventsMember_019e2bd0-cb55-702b-8ece-8b5d8fbd641e" xlink:to="loc_rnr_A2017LargeLossEventsMember_019e2bd0-cb55-722a-90c8-a20ce7870ddd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_OtherCatastropheEventsAndAttritionalLossMovementsMember_019e2bd0-cb55-73cc-919c-bc8793129250" xlink:href="rnr-20260630.xsd#rnr_OtherCatastropheEventsAndAttritionalLossMovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-74dd-9238-b81adf91108d" xlink:to="loc_rnr_OtherCatastropheEventsAndAttritionalLossMovementsMember_019e2bd0-cb55-73cc-919c-bc8793129250" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_LargeandSmallCatastropheEventsAndAttritionalLossMovementsMember_019e2bd0-cb55-762d-822c-ac35a4b7aa05" xlink:href="rnr-20260630.xsd#rnr_LargeandSmallCatastropheEventsAndAttritionalLossMovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CatastrophicEventDomain_019e2bd0-cb55-74dd-9238-b81adf91108d" xlink:to="loc_rnr_LargeandSmallCatastropheEventsAndAttritionalLossMovementsMember_019e2bd0-cb55-762d-822c-ac35a4b7aa05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncatastrophicEventAxis_019e2bd0-cb55-7f31-b609-d0af4885eeab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncatastrophicEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsTable_019e2bd0-cb55-73d3-b838-ec1006727d64" xlink:to="loc_us-gaap_NoncatastrophicEventAxis_019e2bd0-cb55-7f31-b609-d0af4885eeab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncatastrophicEventDomain_019e2bd0-cb55-7f31-b609-d0af4885eeab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncatastrophicEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_NoncatastrophicEventAxis_019e2bd0-cb55-7f31-b609-d0af4885eeab" xlink:to="loc_us-gaap_NoncatastrophicEventDomain_019e2bd0-cb55-7f31-b609-d0af4885eeab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncatastrophicEventDomain_019e2bd0-cb55-73f0-b3cb-02ef025e4bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncatastrophicEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_NoncatastrophicEventAxis_019e2bd0-cb55-7f31-b609-d0af4885eeab" xlink:to="loc_us-gaap_NoncatastrophicEventDomain_019e2bd0-cb55-73f0-b3cb-02ef025e4bb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ChangeInActuarialAssumptionMember_019e2bd0-cb55-7420-9de7-72e5dc96ef51" xlink:href="rnr-20260630.xsd#rnr_ChangeInActuarialAssumptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncatastrophicEventDomain_019e2bd0-cb55-73f0-b3cb-02ef025e4bb4" xlink:to="loc_rnr_ChangeInActuarialAssumptionMember_019e2bd0-cb55-7420-9de7-72e5dc96ef51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ReportedClaimsLessThanExpectedMember_019e2bd0-cb55-77af-9e66-4ac07a43b3c5" xlink:href="rnr-20260630.xsd#rnr_ReportedClaimsLessThanExpectedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncatastrophicEventDomain_019e2bd0-cb55-73f0-b3cb-02ef025e4bb4" xlink:to="loc_rnr_ReportedClaimsLessThanExpectedMember_019e2bd0-cb55-77af-9e66-4ac07a43b3c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019e2bd0-cb55-7700-b111-ac3e01ab3c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019e2bd0-cb55-7071-bcfb-d2774e9b3bfc" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019e2bd0-cb55-7700-b111-ac3e01ab3c7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PriorYearClaimsAndClaimsAdjustmentExpenseAmortizationOfFairValueAdjustment_019e2bd0-cb55-7f29-9f03-060bd511294e" xlink:href="rnr-20260630.xsd#rnr_PriorYearClaimsAndClaimsAdjustmentExpenseAmortizationOfFairValueAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019e2bd0-cb55-7071-bcfb-d2774e9b3bfc" xlink:to="loc_rnr_PriorYearClaimsAndClaimsAdjustmentExpenseAmortizationOfFairValueAdjustment_019e2bd0-cb55-7f29-9f03-060bd511294e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/RESERVEFORCLAIMSANDCLAIMEXPENSESNarrativeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#RESERVEFORCLAIMSANDCLAIMEXPENSESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/RESERVEFORCLAIMSANDCLAIMEXPENSESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019f7fb6-82aa-7619-8047-649af0cc4ffa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForCatastropheClaimsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsTable_019f7fb6-82aa-7567-b01b-576a290d8405" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForCatastropheClaimsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019f7fb6-82aa-7619-8047-649af0cc4ffa" xlink:to="loc_us-gaap_LiabilityForCatastropheClaimsTable_019f7fb6-82aa-7567-b01b-576a290d8405" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019f7fb6-82aa-7ddc-8a02-2e58e2bd7d61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsTable_019f7fb6-82aa-7567-b01b-576a290d8405" xlink:to="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019f7fb6-82aa-7ddc-8a02-2e58e2bd7d61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CatastrophicEventDomain_019f7fb6-82aa-7ddc-8a02-2e58e2bd7d61_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CatastrophicEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019f7fb6-82aa-7ddc-8a02-2e58e2bd7d61" xlink:to="loc_us-gaap_CatastrophicEventDomain_019f7fb6-82aa-7ddc-8a02-2e58e2bd7d61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CatastrophicEventDomain_019f7fb6-82aa-783d-858e-8721010ddf5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CatastrophicEventDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_019f7fb6-82aa-7ddc-8a02-2e58e2bd7d61" xlink:to="loc_us-gaap_CatastrophicEventDomain_019f7fb6-82aa-783d-858e-8721010ddf5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_BaltimoreBridgeCollapseMember_019f7fb6-d599-7a83-a40a-0d1c007ecf40" xlink:href="rnr-20260630.xsd#rnr_BaltimoreBridgeCollapseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CatastrophicEventDomain_019f7fb6-82aa-783d-858e-8721010ddf5b" xlink:to="loc_rnr_BaltimoreBridgeCollapseMember_019f7fb6-d599-7a83-a40a-0d1c007ecf40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019f7fb7-80d6-760d-bf67-27e09bb5f914" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsTable_019f7fb6-82aa-7567-b01b-576a290d8405" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019f7fb7-80d6-760d-bf67-27e09bb5f914" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019f7fb7-80d6-760d-bf67-27e09bb5f914_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019f7fb7-80d6-760d-bf67-27e09bb5f914" xlink:to="loc_us-gaap_SegmentDomain_019f7fb7-80d6-760d-bf67-27e09bb5f914_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019f7fb7-80d6-79d1-8810-895d8b06799c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019f7fb7-80d6-760d-bf67-27e09bb5f914" xlink:to="loc_us-gaap_SegmentDomain_019f7fb7-80d6-79d1-8810-895d8b06799c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CasualtyandSpecialtySegmentMember_019f7fb7-c56a-7668-8314-6550591a8a0d" xlink:href="rnr-20260630.xsd#rnr_CasualtyandSpecialtySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019f7fb7-80d6-79d1-8810-895d8b06799c" xlink:to="loc_rnr_CasualtyandSpecialtySegmentMember_019f7fb7-c56a-7668-8314-6550591a8a0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019f7fb6-82aa-7276-be80-c2973aac82bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsLineItems_019f7fb6-82aa-7619-8047-649af0cc4ffa" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019f7fb6-82aa-7276-be80-c2973aac82bb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DEBTANDCREDITFACILITIESScheduleofDebtObligationsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#DEBTANDCREDITFACILITIESScheduleofDebtObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DEBTANDCREDITFACILITIESScheduleofDebtObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e2bd0-cb55-7c0e-80f0-c9d83f735886" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e2bd0-cb55-7096-bdc3-b25925dfd464" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e2bd0-cb55-7c0e-80f0-c9d83f735886" xlink:to="loc_us-gaap_DebtInstrumentTable_019e2bd0-cb55-7096-bdc3-b25925dfd464" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7d1a-8ec6-cf6b8ce27569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e2bd0-cb55-7096-bdc3-b25925dfd464" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7d1a-8ec6-cf6b8ce27569" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7d1a-8ec6-cf6b8ce27569_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7d1a-8ec6-cf6b8ce27569" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7d1a-8ec6-cf6b8ce27569_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7d1a-8ec6-cf6b8ce27569" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A7.003SeniorNotesDue2035Member_019e2bd0-cb55-70b0-b0ad-353cb41f7e65" xlink:href="rnr-20260630.xsd#rnr_A7.003SeniorNotesDue2035Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:to="loc_rnr_A7.003SeniorNotesDue2035Member_019e2bd0-cb55-70b0-b0ad-353cb41f7e65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A5.950SeniorNotesDue2035Member_019e2bd0-cb55-7049-83ed-1e424aa7ec42" xlink:href="rnr-20260630.xsd#rnr_A5.950SeniorNotesDue2035Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:to="loc_rnr_A5.950SeniorNotesDue2035Member_019e2bd0-cb55-7049-83ed-1e424aa7ec42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A5.800SeniorNotesDue2035Member_019e2bd0-cb55-7d1f-ae8c-c849a913314b" xlink:href="rnr-20260630.xsd#rnr_A5.800SeniorNotesDue2035Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:to="loc_rnr_A5.800SeniorNotesDue2035Member_019e2bd0-cb55-7d1f-ae8c-c849a913314b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A5.750SeniorNotesDue2033Member_019e2bd0-cb55-73ca-82c5-6e425ac19f58" xlink:href="rnr-20260630.xsd#rnr_A5.750SeniorNotesDue2033Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:to="loc_rnr_A5.750SeniorNotesDue2033Member_019e2bd0-cb55-73ca-82c5-6e425ac19f58" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A3.600SeniorNotesDue2029Member_019e2bd0-cb55-7349-a59b-493e75ee4ff3" xlink:href="rnr-20260630.xsd#rnr_A3.600SeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:to="loc_rnr_A3.600SeniorNotesDue2029Member_019e2bd0-cb55-7349-a59b-493e75ee4ff3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_A3.450SeniorNotesDueJuly12027Member_019e2bd0-cb55-7504-9048-4109573e67aa" xlink:href="rnr-20260630.xsd#rnr_A3.450SeniorNotesDueJuly12027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7e32-a319-58281595509d" xlink:to="loc_rnr_A3.450SeniorNotesDueJuly12027Member_019e2bd0-cb55-7504-9048-4109573e67aa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-737e-b818-5cc8b6113c7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e2bd0-cb55-7096-bdc3-b25925dfd464" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-737e-b818-5cc8b6113c7b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-737e-b818-5cc8b6113c7b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-737e-b818-5cc8b6113c7b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-737e-b818-5cc8b6113c7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-748c-83a0-3cb7bf634a4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-737e-b818-5cc8b6113c7b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-748c-83a0-3cb7bf634a4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019e2bd0-cb55-7cb6-b994-4f2a29e2ad8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-748c-83a0-3cb7bf634a4c" xlink:to="loc_us-gaap_SeniorNotesMember_019e2bd0-cb55-7cb6-b994-4f2a29e2ad8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e2bd0-cb55-7f6d-a36b-d4e376e0a882" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e2bd0-cb55-7096-bdc3-b25925dfd464" xlink:to="loc_dei_LegalEntityAxis_019e2bd0-cb55-7f6d-a36b-d4e376e0a882" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb55-7f6d-a36b-d4e376e0a882_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb55-7f6d-a36b-d4e376e0a882" xlink:to="loc_dei_EntityDomain_019e2bd0-cb55-7f6d-a36b-d4e376e0a882_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb55-7ab2-ae31-ac4cb7f9aa25" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb55-7f6d-a36b-d4e376e0a882" xlink:to="loc_dei_EntityDomain_019e2bd0-cb55-7ab2-ae31-ac4cb7f9aa25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb55-7f3b-9e6a-2a38fe295bb8" xlink:href="rnr-20260630.xsd#rnr_FontanaHoldingsLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7ab2-ae31-ac4cb7f9aa25" xlink:to="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb55-7f3b-9e6a-2a38fe295bb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb55-7b15-b2d2-8dbd900e67d5" xlink:href="rnr-20260630.xsd#rnr_DaVinciReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7ab2-ae31-ac4cb7f9aa25" xlink:to="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb55-7b15-b2d2-8dbd900e67d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReFinanceInc.Member_019e2bd0-cb55-73ee-9516-1302484a33b8" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReFinanceInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7ab2-ae31-ac4cb7f9aa25" xlink:to="loc_rnr_RenaissanceReFinanceInc.Member_019e2bd0-cb55-73ee-9516-1302484a33b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e2bd0-cb55-7fb2-a605-dcf0fbf0fa25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e2bd0-cb55-7096-bdc3-b25925dfd464" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e2bd0-cb55-7fb2-a605-dcf0fbf0fa25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e2bd0-cb55-7fb2-a605-dcf0fbf0fa25_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e2bd0-cb55-7fb2-a605-dcf0fbf0fa25" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e2bd0-cb55-7fb2-a605-dcf0fbf0fa25_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e2bd0-cb55-731e-afd4-9a3a75bc0a51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e2bd0-cb55-7fb2-a605-dcf0fbf0fa25" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e2bd0-cb55-731e-afd4-9a3a75bc0a51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e2bd0-cb55-7e9b-8951-3793a8c18e2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e2bd0-cb55-731e-afd4-9a3a75bc0a51" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e2bd0-cb55-7e9b-8951-3793a8c18e2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e2bd0-cb55-70bd-a357-3d3b0f2777fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e2bd0-cb55-7e9b-8951-3793a8c18e2a" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e2bd0-cb55-70bd-a357-3d3b0f2777fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e2bd0-cb55-7d65-a092-b74a63e1b087" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e2bd0-cb55-7e9b-8951-3793a8c18e2a" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e2bd0-cb55-7d65-a092-b74a63e1b087" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e2bd0-cb55-75d6-8f4f-3f859bbcb203" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e2bd0-cb55-7c0e-80f0-c9d83f735886" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e2bd0-cb55-75d6-8f4f-3f859bbcb203" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e2bd0-cb55-7fad-9818-54cccce600d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e2bd0-cb55-7c0e-80f0-c9d83f735886" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e2bd0-cb55-7fad-9818-54cccce600d8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DEBTANDCREDITFACILITIESScheduleofOutstandingAmountsIssuedorDrawnunderCreditFacilitiesDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#DEBTANDCREDITFACILITIESScheduleofOutstandingAmountsIssuedorDrawnunderCreditFacilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DEBTANDCREDITFACILITIESScheduleofOutstandingAmountsIssuedorDrawnunderCreditFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_019e2bd0-cb55-7951-aa98-02d22dca7af6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_019e2bd0-cb55-7d59-b38a-ed62e60a81e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e2bd0-cb55-7951-aa98-02d22dca7af6" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_019e2bd0-cb55-7d59-b38a-ed62e60a81e0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb55-79b7-8182-0618a365f58f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e2bd0-cb55-7d59-b38a-ed62e60a81e0" xlink:to="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb55-79b7-8182-0618a365f58f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb55-79b7-8182-0618a365f58f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb55-79b7-8182-0618a365f58f" xlink:to="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb55-79b7-8182-0618a365f58f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb55-737d-b1e2-a1eb6bcfcce6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb55-79b7-8182-0618a365f58f" xlink:to="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb55-737d-b1e2-a1eb6bcfcce6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e2bd0-cb55-7196-a302-1d5df01e003e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb55-737d-b1e2-a1eb6bcfcce6" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e2bd0-cb55-7196-a302-1d5df01e003e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019e2bd0-cb55-7c0e-94e6-0eac9affa7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb55-737d-b1e2-a1eb6bcfcce6" xlink:to="loc_us-gaap_LetterOfCreditMember_019e2bd0-cb55-7c0e-94e6-0eac9affa7a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-70a5-8dc3-c884baf3103b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e2bd0-cb55-7d59-b38a-ed62e60a81e0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-70a5-8dc3-c884baf3103b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-70a5-8dc3-c884baf3103b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-70a5-8dc3-c884baf3103b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-70a5-8dc3-c884baf3103b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-77b3-bdae-d39bd29809bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e2bd0-cb55-70a5-8dc3-c884baf3103b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-77b3-bdae-d39bd29809bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019e2bd0-cb55-70e6-adef-9a6650908d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e2bd0-cb55-77b3-bdae-d39bd29809bf" xlink:to="loc_us-gaap_LineOfCreditMember_019e2bd0-cb55-70e6-adef-9a6650908d9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7080-9f40-8c1a8a32311e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e2bd0-cb55-7d59-b38a-ed62e60a81e0" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7080-9f40-8c1a8a32311e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7080-9f40-8c1a8a32311e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7080-9f40-8c1a8a32311e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7080-9f40-8c1a8a32311e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7932-96d9-a10f0b71566f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e2bd0-cb55-7080-9f40-8c1a8a32311e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7932-96d9-a10f0b71566f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_SecuredBilateralFacilityMember_019e2bd0-cb55-7a8d-9931-b7d668617271" xlink:href="rnr-20260630.xsd#rnr_SecuredBilateralFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7932-96d9-a10f0b71566f" xlink:to="loc_rnr_SecuredBilateralFacilityMember_019e2bd0-cb55-7a8d-9931-b7d668617271" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_UnsecuredBilateralFacilityMember_019e2bd0-cb55-7b3b-8227-3a65d1dfb18e" xlink:href="rnr-20260630.xsd#rnr_UnsecuredBilateralFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e2bd0-cb55-7932-96d9-a10f0b71566f" xlink:to="loc_rnr_UnsecuredBilateralFacilityMember_019e2bd0-cb55-7b3b-8227-3a65d1dfb18e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e2bd0-cb55-7149-8d60-c7007657f039" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e2bd0-cb55-7951-aa98-02d22dca7af6" xlink:to="loc_us-gaap_LineOfCredit_019e2bd0-cb55-7149-8d60-c7007657f039" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/NONCONTROLLINGINTERESTSScheduleofNoncontrollingInterestsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#NONCONTROLLINGINTERESTSScheduleofNoncontrollingInterestsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/NONCONTROLLINGINTERESTSScheduleofNoncontrollingInterestsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7d2f-b411-df3f8aab5327" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb55-7b27-8000-cf9bad17a755" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7d2f-b411-df3f8aab5327" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb55-7b27-8000-cf9bad17a755" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e2bd0-cb55-70d9-a7b6-5e5144624894" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb55-7b27-8000-cf9bad17a755" xlink:to="loc_dei_LegalEntityAxis_019e2bd0-cb55-70d9-a7b6-5e5144624894" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb55-70d9-a7b6-5e5144624894_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb55-70d9-a7b6-5e5144624894" xlink:to="loc_dei_EntityDomain_019e2bd0-cb55-70d9-a7b6-5e5144624894_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb55-7da8-a39d-608f1e7244d4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb55-70d9-a7b6-5e5144624894" xlink:to="loc_dei_EntityDomain_019e2bd0-cb55-7da8-a39d-608f1e7244d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb55-70f0-9695-dd3f34dc5b80" xlink:href="rnr-20260630.xsd#rnr_DaVinciReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7da8-a39d-608f1e7244d4" xlink:to="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb55-70f0-9695-dd3f34dc5b80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb55-7b2c-8e69-7499a531c6ef" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciFundLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7da8-a39d-608f1e7244d4" xlink:to="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb55-7b2c-8e69-7499a531c6ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb55-79e1-b545-a4e33ef5761e" xlink:href="rnr-20260630.xsd#rnr_VermeerReinsuranceLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7da8-a39d-608f1e7244d4" xlink:to="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb55-79e1-b545-a4e33ef5761e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb55-75f1-a125-b00bbd79fef5" xlink:href="rnr-20260630.xsd#rnr_FontanaHoldingsLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb55-7da8-a39d-608f1e7244d4" xlink:to="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb55-75f1-a125-b00bbd79fef5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7f8a-b547-6b9eaacf7a50" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb55-7b27-8000-cf9bad17a755" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7f8a-b547-6b9eaacf7a50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7f8a-b547-6b9eaacf7a50_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7f8a-b547-6b9eaacf7a50" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7f8a-b547-6b9eaacf7a50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-79b4-9566-6d900931f992" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7f8a-b547-6b9eaacf7a50" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-79b4-9566-6d900931f992" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e2bd0-cb56-7369-adc7-2462b5be8dbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-79b4-9566-6d900931f992" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e2bd0-cb56-7369-adc7-2462b5be8dbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e2bd0-cb56-7379-adb3-7daba28c8b53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7d2f-b411-df3f8aab5327" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e2bd0-cb56-7379-adb3-7daba28c8b53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-cb56-7494-a212-607eb79e0d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7d2f-b411-df3f8aab5327" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-cb56-7494-a212-607eb79e0d3e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/NONCONTROLLINGINTERESTSNarrativeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#NONCONTROLLINGINTERESTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/NONCONTROLLINGINTERESTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7060-9a04-878feac170a0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7060-9a04-878feac170a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7060-9a04-878feac170a0_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7060-9a04-878feac170a0" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7060-9a04-878feac170a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-79eb-b4e4-db02df8c6367" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-7060-9a04-878feac170a0" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-79eb-b4e4-db02df8c6367" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e2bd0-cb56-72ce-9822-f19845af953b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-79eb-b4e4-db02df8c6367" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e2bd0-cb56-72ce-9822-f19845af953b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e2bd0-cb56-79e8-b78d-80fe8418ba86" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_srt_RangeAxis_019e2bd0-cb56-79e8-b78d-80fe8418ba86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e2bd0-cb56-79e8-b78d-80fe8418ba86_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e2bd0-cb56-79e8-b78d-80fe8418ba86" xlink:to="loc_srt_RangeMember_019e2bd0-cb56-79e8-b78d-80fe8418ba86_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e2bd0-cb56-7176-b8d8-a39d14810adc" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e2bd0-cb56-79e8-b78d-80fe8418ba86" xlink:to="loc_srt_RangeMember_019e2bd0-cb56-7176-b8d8-a39d14810adc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e2bd0-cb56-7264-b528-3b5883d28e30" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e2bd0-cb56-7176-b8d8-a39d14810adc" xlink:to="loc_srt_MaximumMember_019e2bd0-cb56-7264-b528-3b5883d28e30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e2bd0-cb56-766a-9b03-85e67b0dcb6e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_dei_LegalEntityAxis_019e2bd0-cb56-766a-9b03-85e67b0dcb6e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb56-766a-9b03-85e67b0dcb6e_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb56-766a-9b03-85e67b0dcb6e" xlink:to="loc_dei_EntityDomain_019e2bd0-cb56-766a-9b03-85e67b0dcb6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb56-766a-9b03-85e67b0dcb6e" xlink:to="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-78ff-b6da-42665d3b25be" xlink:href="rnr-20260630.xsd#rnr_DaVinciReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:to="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-78ff-b6da-42665d3b25be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-751e-b77c-cf6154c49ddf" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciFundLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:to="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-751e-b77c-cf6154c49ddf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb56-7f41-8e1e-37683299ebd3" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciUCITSFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:to="loc_rnr_RenaissanceReMediciUCITSFundMember_019e2bd0-cb56-7f41-8e1e-37683299ebd3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PFZWMember_019e2bd0-cb56-7c6a-b9a7-0f5460747877" xlink:href="rnr-20260630.xsd#rnr_PFZWMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:to="loc_rnr_PFZWMember_019e2bd0-cb56-7c6a-b9a7-0f5460747877" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb56-7b74-9623-45b149d8e5cc" xlink:href="rnr-20260630.xsd#rnr_VermeerReinsuranceLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:to="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb56-7b74-9623-45b149d8e5cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb56-73ba-a9d5-957f9a476470" xlink:href="rnr-20260630.xsd#rnr_FontanaHoldingsLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7a79-bf91-747ded22b2f1" xlink:to="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb56-73ba-a9d5-957f9a476470" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e2bd0-cb56-7bbc-a907-9064afe37e1a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_srt_CounterpartyNameAxis_019e2bd0-cb56-7bbc-a907-9064afe37e1a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-7bbc-a907-9064afe37e1a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e2bd0-cb56-7bbc-a907-9064afe37e1a" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-7bbc-a907-9064afe37e1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e2bd0-cb56-7bbc-a907-9064afe37e1a" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ThirdPartyInvestorsMember_019e2bd0-cb56-7640-ad9b-1e160950fc72" xlink:href="rnr-20260630.xsd#rnr_ThirdPartyInvestorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_ThirdPartyInvestorsMember_019e2bd0-cb56-7640-ad9b-1e160950fc72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReHoldingsLtd.Member_019e2bd0-cb56-749f-9e6f-b6502033fe8a" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_RenaissanceReHoldingsLtd.Member_019e2bd0-cb56-749f-9e6f-b6502033fe8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-74ab-acdb-ae785394397b" xlink:href="rnr-20260630.xsd#rnr_DaVinciReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-74ab-acdb-ae785394397b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DavinciReThirdPartyInvestorsMember_019e2bd0-cb56-7d61-bdd7-183b08bafaad" xlink:href="rnr-20260630.xsd#rnr_DavinciReThirdPartyInvestorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_DavinciReThirdPartyInvestorsMember_019e2bd0-cb56-7d61-bdd7-183b08bafaad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-746b-a074-ea56810c48ef" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciFundLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-746b-a074-ea56810c48ef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_StichtingPensioenfondsZorgEnWelzijnMember_019e2bd0-cb56-7dad-9e79-b2e111d19d78" xlink:href="rnr-20260630.xsd#rnr_StichtingPensioenfondsZorgEnWelzijnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_StichtingPensioenfondsZorgEnWelzijnMember_019e2bd0-cb56-7dad-9e79-b2e111d19d78" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FontanaThirdPartyInvestorsMember_019e2bd0-cb56-7130-aaca-7c8ac67c0eaa" xlink:href="rnr-20260630.xsd#rnr_FontanaThirdPartyInvestorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e2bd0-cb56-70f0-be8d-af04cfd8d161" xlink:to="loc_rnr_FontanaThirdPartyInvestorsMember_019e2bd0-cb56-7130-aaca-7c8ac67c0eaa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019e2bd0-cb56-7137-9b51-6ae77199c497" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_srt_OwnershipAxis_019e2bd0-cb56-7137-9b51-6ae77199c497" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e2bd0-cb56-7137-9b51-6ae77199c497_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019e2bd0-cb56-7137-9b51-6ae77199c497" xlink:to="loc_srt_OwnershipDomain_019e2bd0-cb56-7137-9b51-6ae77199c497_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e2bd0-cb56-781b-9148-8c999fb16fa0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019e2bd0-cb56-7137-9b51-6ae77199c497" xlink:to="loc_srt_OwnershipDomain_019e2bd0-cb56-781b-9148-8c999fb16fa0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-72d0-8de3-8545dc169715" xlink:href="rnr-20260630.xsd#rnr_DaVinciReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e2bd0-cb56-781b-9148-8c999fb16fa0" xlink:to="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-72d0-8de3-8545dc169715" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-7db8-afe0-9e548451a232" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciFundLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e2bd0-cb56-781b-9148-8c999fb16fa0" xlink:to="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-7db8-afe0-9e548451a232" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb56-73d9-8baa-e0cba82cfc2b" xlink:href="rnr-20260630.xsd#rnr_VermeerReinsuranceLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e2bd0-cb56-781b-9148-8c999fb16fa0" xlink:to="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb56-73d9-8baa-e0cba82cfc2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb56-7baf-9a79-08612e87d6cd" xlink:href="rnr-20260630.xsd#rnr_FontanaHoldingsLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e2bd0-cb56-781b-9148-8c999fb16fa0" xlink:to="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb56-7baf-9a79-08612e87d6cd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb56-73b6-b8ff-fc4b5158c3fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb56-73b6-b8ff-fc4b5158c3fb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb56-73b6-b8ff-fc4b5158c3fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb56-73b6-b8ff-fc4b5158c3fb" xlink:to="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb56-73b6-b8ff-fc4b5158c3fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb56-73b5-a314-0b80f4d22ef3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e2bd0-cb56-73b6-b8ff-fc4b5158c3fb" xlink:to="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb56-73b5-a314-0b80f4d22ef3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e2bd0-cb56-7e8e-8eef-78176f8b107c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e2bd0-cb56-73b5-a314-0b80f4d22ef3" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e2bd0-cb56-7e8e-8eef-78176f8b107c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-7adf-9e06-20693921b109" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-762d-83d0-e1d2569ee28f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-7adf-9e06-20693921b109" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7adf-9e06-20693921b109_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-7adf-9e06-20693921b109" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7adf-9e06-20693921b109_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7d10-8424-3074445eaa08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-7adf-9e06-20693921b109" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7d10-8424-3074445eaa08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VotingNonparticipatingSharesMember_019e2bd0-cb56-78dd-9718-049ceb06b809" xlink:href="rnr-20260630.xsd#rnr_VotingNonparticipatingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7d10-8424-3074445eaa08" xlink:to="loc_rnr_VotingNonparticipatingSharesMember_019e2bd0-cb56-78dd-9718-049ceb06b809" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ParticipatingNonvotingCommonSharesMember_019e2bd0-cb56-7dfe-a7d5-39b72034a96b" xlink:href="rnr-20260630.xsd#rnr_ParticipatingNonvotingCommonSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7d10-8424-3074445eaa08" xlink:to="loc_rnr_ParticipatingNonvotingCommonSharesMember_019e2bd0-cb56-7dfe-a7d5-39b72034a96b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MinorityInterestAggregateShareRepurchaseRequestLimitAsPercentOfCapital_019e2bd0-cb56-7d44-bb04-4b8598137f56" xlink:href="rnr-20260630.xsd#rnr_MinorityInterestAggregateShareRepurchaseRequestLimitAsPercentOfCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_rnr_MinorityInterestAggregateShareRepurchaseRequestLimitAsPercentOfCapital_019e2bd0-cb56-7d44-bb04-4b8598137f56" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019e2bd0-cb56-7034-9504-76fbea021623" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019e2bd0-cb56-7034-9504-76fbea021623" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_019e2bd0-cb56-7ca7-b5ed-b5f7dd07407e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_019e2bd0-cb56-7ca7-b5ed-b5f7dd07407e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_019e2bd0-cb56-7d7f-8fec-106b8bbd12e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_PaymentsToMinorityShareholders_019e2bd0-cb56-7d7f-8fec-106b8bbd12e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e2bd0-cb56-712f-acc0-83eb9fae9def" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_Assets_019e2bd0-cb56-712f-acc0-83eb9fae9def" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e2bd0-cb56-75fe-9ea0-8f852a554537" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_Liabilities_019e2bd0-cb56-75fe-9ea0-8f852a554537" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e2bd0-cb56-780e-b43c-8ec3cfab94a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_Investments_019e2bd0-cb56-780e-b43c-8ec3cfab94a3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019e2bd0-cb56-7bf7-83ee-a4b756d3b1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_OtherAssets_019e2bd0-cb56-7bf7-83ee-a4b756d3b1ff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e2bd0-cb56-751d-80aa-c883662ef6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e2bd0-cb56-751d-80aa-c883662ef6ab" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e2bd0-cb56-72a1-9f23-61501c46fca1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_LongTermDebt_019e2bd0-cb56-72a1-9f23-61501c46fca1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019e2bd0-cb56-739c-875d-f5823e51606c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_OtherLiabilities_019e2bd0-cb56-739c-875d-f5823e51606c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019e2bd0-cb56-7585-910e-5cbbacc6b572" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019e2bd0-cb56-7585-910e-5cbbacc6b572" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019e2bd0-cb56-709f-82e9-d239deb54885" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019e2bd0-cb56-709f-82e9-d239deb54885" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NoncontrollingInterestRedemptionProvisionNoticePeriod_019e2bd0-cb56-7731-8d88-e30a4310dd42" xlink:href="rnr-20260630.xsd#rnr_NoncontrollingInterestRedemptionProvisionNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_rnr_NoncontrollingInterestRedemptionProvisionNoticePeriod_019e2bd0-cb56-7731-8d88-e30a4310dd42" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e2bd0-cb56-708e-a08f-cba7ffed8109" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e2bd0-cb56-708e-a08f-cba7ffed8109" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuanceTransferInKindFromExistingInvestors_019e2bd0-cb56-7c7d-afb7-f826621002f9" xlink:href="rnr-20260630.xsd#rnr_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuanceTransferInKindFromExistingInvestors"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_rnr_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuanceTransferInKindFromExistingInvestors_019e2bd0-cb56-7c7d-afb7-f826621002f9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_019e2bd0-cb56-7847-9839-df2a52a8ba4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_PaymentsOfDividends_019e2bd0-cb56-7847-9839-df2a52a8ba4d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019e2bd0-cb56-7770-8d1e-d624d2113e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7587-ad0f-ba288adfc2b9" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019e2bd0-cb56-7770-8d1e-d624d2113e2f" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/NONCONTROLLINGINTERESTSScheduleofActivityinRedeemableNoncontrollingInterestDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#NONCONTROLLINGINTERESTSScheduleofActivityinRedeemableNoncontrollingInterestDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/NONCONTROLLINGINTERESTSScheduleofActivityinRedeemableNoncontrollingInterestDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7b3e-abb7-1772c0480352" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-7532-acb3-e7c2c5942fa8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7b3e-abb7-1772c0480352" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-7532-acb3-e7c2c5942fa8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e2bd0-cb56-7e5c-a328-fb04cd4b0d62" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-7532-acb3-e7c2c5942fa8" xlink:to="loc_dei_LegalEntityAxis_019e2bd0-cb56-7e5c-a328-fb04cd4b0d62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb56-7e5c-a328-fb04cd4b0d62_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb56-7e5c-a328-fb04cd4b0d62" xlink:to="loc_dei_EntityDomain_019e2bd0-cb56-7e5c-a328-fb04cd4b0d62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e2bd0-cb56-7297-a602-81e3b3e329e3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e2bd0-cb56-7e5c-a328-fb04cd4b0d62" xlink:to="loc_dei_EntityDomain_019e2bd0-cb56-7297-a602-81e3b3e329e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-79be-9c4a-bd4b4e5ed0d4" xlink:href="rnr-20260630.xsd#rnr_DaVinciReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7297-a602-81e3b3e329e3" xlink:to="loc_rnr_DaVinciReHoldingsLtd.Member_019e2bd0-cb56-79be-9c4a-bd4b4e5ed0d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-7ed0-a440-f942fca17354" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReMediciFundLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7297-a602-81e3b3e329e3" xlink:to="loc_rnr_RenaissanceReMediciFundLtd.Member_019e2bd0-cb56-7ed0-a440-f942fca17354" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb56-773d-9b5d-4a0c3f1f1cc2" xlink:href="rnr-20260630.xsd#rnr_VermeerReinsuranceLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7297-a602-81e3b3e329e3" xlink:to="loc_rnr_VermeerReinsuranceLtd.Member_019e2bd0-cb56-773d-9b5d-4a0c3f1f1cc2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb56-75c1-b9ea-96ad0ced3833" xlink:href="rnr-20260630.xsd#rnr_FontanaHoldingsLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e2bd0-cb56-7297-a602-81e3b3e329e3" xlink:to="loc_rnr_FontanaHoldingsLPMember_019e2bd0-cb56-75c1-b9ea-96ad0ced3833" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-785e-a67c-8268c90b3083" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019e2bd0-cb56-7532-acb3-e7c2c5942fa8" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-785e-a67c-8268c90b3083" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-785e-a67c-8268c90b3083_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-785e-a67c-8268c90b3083" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-785e-a67c-8268c90b3083_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7122-a905-898b1ccd8a1d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e2bd0-cb56-785e-a67c-8268c90b3083" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7122-a905-898b1ccd8a1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e2bd0-cb56-73fa-8562-ce7f475be42b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e2bd0-cb56-7122-a905-898b1ccd8a1d" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e2bd0-cb56-73fa-8562-ce7f475be42b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019e2bd0-cb56-7b3e-abb7-1772c0480352" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e2bd0-cb56-706e-8397-4f41fb428573" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e2bd0-cb56-706e-8397-4f41fb428573" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019e2bd0-cb56-766b-a413-62b591ba2154" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019e2bd0-cb56-766b-a413-62b591ba2154" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019e2bd0-cb56-7ed8-be68-7e620c663fd9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019e2bd0-cb56-7ed8-be68-7e620c663fd9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NetIncomeLossAttributableToRedeemableNoncontrollingInterestNetOfAdjustments_019e2bd0-cb56-7965-8030-cff96531ff10" xlink:href="rnr-20260630.xsd#rnr_NetIncomeLossAttributableToRedeemableNoncontrollingInterestNetOfAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:to="loc_rnr_NetIncomeLossAttributableToRedeemableNoncontrollingInterestNetOfAdjustments_019e2bd0-cb56-7965-8030-cff96531ff10" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-cb56-7206-acae-897c24f5e3a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-cb56-7206-acae-897c24f5e3a7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019e2bd0-cb56-7c34-ac1c-5f55be865dc3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019e2bd0-cb56-78e6-906d-e9a016c0ab99" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019e2bd0-cb56-7c34-ac1c-5f55be865dc3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e2bd0-cb56-7046-8a38-9bac377a2cb9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/VARIABLEINTERESTENTITIESDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#VARIABLEINTERESTENTITIESDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/VARIABLEINTERESTENTITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-7f1f-90a8-51ef0669d6c1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-7f1f-90a8-51ef0669d6c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e683f-9fca-7218-8e76-7c4c8c21fe3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e683f-9fca-7218-8e76-7c4c8c21fe3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019e683f-9fca-71cc-a719-34f365495919" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019e683f-9fca-71cc-a719-34f365495919" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-77b2-9c80-640ecf25181e_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-77b2-9c80-640ecf25181e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InvestorsOfUpsilonRFODiversifiedIIIAndIIIMember_019e683f-9fca-73ac-883f-b8421fe682d0" xlink:href="rnr-20260630.xsd#rnr_InvestorsOfUpsilonRFODiversifiedIIIAndIIIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_InvestorsOfUpsilonRFODiversifiedIIIAndIIIMember_019e683f-9fca-73ac-883f-b8421fe682d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReHoldingsLtd.Member_019e683f-9fca-72c1-a70c-955bc84d2d51" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_RenaissanceReHoldingsLtd.Member_019e683f-9fca-72c1-a70c-955bc84d2d51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InvestorsOfUpsilonRFODiversifiedIVMember_019e683f-9fca-7752-9581-fa8bf3f50d2b" xlink:href="rnr-20260630.xsd#rnr_InvestorsOfUpsilonRFODiversifiedIVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_InvestorsOfUpsilonRFODiversifiedIVMember_019e683f-9fca-7752-9581-fa8bf3f50d2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestorMember_019e683f-9fca-7d7e-b0ee-d54b338fb01e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_us-gaap_InvestorMember_019e683f-9fca-7d7e-b0ee-d54b338fb01e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReinsuranceLtd.Member_019e6840-0829-714c-b005-16fac1e9e6ca" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReinsuranceLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_RenaissanceReinsuranceLtd.Member_019e6840-0829-714c-b005-16fac1e9e6ca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e683f-9fca-71c6-8914-10d6b21402e4_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:to="loc_dei_EntityDomain_019e683f-9fca-71c6-8914-10d6b21402e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:to="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_UpsilonRFOReLtd.Member_019e683f-9fcb-7410-b353-3158e0c1b443" xlink:href="rnr-20260630.xsd#rnr_UpsilonRFOReLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_UpsilonRFOReLtd.Member_019e683f-9fcb-7410-b353-3158e0c1b443" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-7864-a53f-814831e5c2f1" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReUpsilonDiversifiedFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-7864-a53f-814831e5c2f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NOC1Member_019e683f-d2ea-78a7-b317-a5f724f6ce01" xlink:href="rnr-20260630.xsd#rnr_NOC1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_NOC1Member_019e683f-d2ea-78a7-b317-a5f724f6ce01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_StratosMember_019e683f-d2ea-75fc-a7d6-51bd4919272b" xlink:href="rnr-20260630.xsd#rnr_StratosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_StratosMember_019e683f-d2ea-75fc-a7d6-51bd4919272b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MonaLisaReMember_019e6840-0829-7016-bae1-d561df94f9e4" xlink:href="rnr-20260630.xsd#rnr_MonaLisaReMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_MonaLisaReMember_019e6840-0829-7016-bae1-d561df94f9e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-710d-836d-9ac3e79c4d2e" xlink:href="rnr-20260630.xsd#rnr_AlphaCatManagersLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-710d-836d-9ac3e79c4d2e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-725d-b4fd-a4a693042862_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-725d-b4fd-a4a693042862_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-76d4-a606-71f3d7dfefdd" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReUpsilonDiversifiedFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-76d4-a606-71f3d7dfefdd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NOC1Member_019e683f-d2ea-70a2-9e9f-66569bc2873e" xlink:href="rnr-20260630.xsd#rnr_NOC1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_NOC1Member_019e683f-d2ea-70a2-9e9f-66569bc2873e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-7ca7-9c2e-f998d3574c13" xlink:href="rnr-20260630.xsd#rnr_AlphaCatManagersLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-7ca7-9c2e-f998d3574c13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_UpsilonRFOReLtd.Member_019e687f-d7e7-7f9e-81d3-c7b1e91034ad" xlink:href="rnr-20260630.xsd#rnr_UpsilonRFOReLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_UpsilonRFOReLtd.Member_019e687f-d7e7-7f9e-81d3-c7b1e91034ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-7ae1-9271-5403dd19a746_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:to="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-7ae1-9271-5403dd19a746_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-739c-b2b8-bc96cb37b4df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:to="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-739c-b2b8-bc96cb37b4df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_019e683f-d2ea-783c-a7b5-691ac5c45f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-739c-b2b8-bc96cb37b4df" xlink:to="loc_us-gaap_PreferredStockMember_019e683f-d2ea-783c-a7b5-691ac5c45f8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e6840-0829-755e-ab19-540b1aeefdfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e6840-0829-755e-ab19-540b1aeefdfe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NumberOfSegregatedAccounts_019e683f-72bd-79a1-bf80-25e96108a8f1" xlink:href="rnr-20260630.xsd#rnr_NumberOfSegregatedAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_rnr_NumberOfSegregatedAccounts_019e683f-72bd-79a1-bf80-25e96108a8f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfCapitalDistribution_019e683f-9fcb-789b-b4ee-1cac2175cf20" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfCapitalDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_PaymentsOfCapitalDistribution_019e683f-9fcb-789b-b4ee-1cac2175cf20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e683f-9fcb-7147-ba95-9938f9afa989" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_Assets_019e683f-9fcb-7147-ba95-9938f9afa989" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e683f-9fcb-7e33-813f-1dff2b742660" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_Liabilities_019e683f-9fcb-7e33-813f-1dff2b742660" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e683f-9fcb-7ab2-adb5-c52ddb145370" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_Investments_019e683f-9fcb-7ab2-adb5-c52ddb145370" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019e683f-9fcb-7cf7-a4ae-1f23aea275d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_OtherAssets_019e683f-9fcb-7cf7-a4ae-1f23aea275d2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e683f-9fcb-7724-8055-e56f57d240af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e683f-9fcb-7724-8055-e56f57d240af" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019e683f-9fcb-7f43-a792-4a84c1c27bca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_OtherLiabilities_019e683f-9fcb-7f43-a792-4a84c1c27bca" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_019e683f-9fcb-7654-951a-dbc433d70d73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_AssetsNet_019e683f-9fcb-7654-951a-dbc433d70d73" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityOwnershipPercentage_019e683f-9fcb-7c4b-972c-cc377c22cb75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_VariableInterestEntityOwnershipPercentage_019e683f-9fcb-7c4b-972c-cc377c22cb75" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019e683f-9fcb-7b23-8d98-184b08d0e50d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_EquityMethodInvestments_019e683f-9fcb-7b23-8d98-184b08d0e50d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_019e683f-d2ea-7ff8-8d99-baacaa28bc74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_019e683f-d2ea-7ff8-8d99-baacaa28bc74" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_019e683f-d2ea-75b9-904d-1be1eefc11a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_019e683f-d2ea-75b9-904d-1be1eefc11a2" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsWritten_019e6840-0829-732a-aae9-9b6c05bbc384" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededPremiumsWritten"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_CededPremiumsWritten_019e6840-0829-732a-aae9-9b6c05bbc384" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsEarned_019e6840-0829-7eb4-a0e8-e9dec8aeed13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_CededPremiumsEarned_019e6840-0829-7eb4-a0e8-e9dec8aeed13" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VariableInterestEntityInvestmentInParticipatingNotes_019e6840-0829-7690-91d8-19f12641c3d7" xlink:href="rnr-20260630.xsd#rnr_VariableInterestEntityInvestmentInParticipatingNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_rnr_VariableInterestEntityInvestmentInParticipatingNotes_019e6840-0829-7690-91d8-19f12641c3d7" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/VARIABLEINTERESTENTITIESDetails_1" xlink:type="simple" xlink:href="rnr-20260630.xsd#VARIABLEINTERESTENTITIESDetails_1"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/VARIABLEINTERESTENTITIESDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-7f1f-90a8-51ef0669d6c1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-7f1f-90a8-51ef0669d6c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e683f-9fca-7f1f-90a8-51ef0669d6c1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e683f-9fca-7218-8e76-7c4c8c21fe3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e683f-9fca-7218-8e76-7c4c8c21fe3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019e683f-9fca-71cc-a719-34f365495919" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e683f-9fca-79cb-a5c6-ebf6061fd799" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019e683f-9fca-71cc-a719-34f365495919" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-77b2-9c80-640ecf25181e_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-77b2-9c80-640ecf25181e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e683f-9fca-77b2-9c80-640ecf25181e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InvestorsOfUpsilonRFODiversifiedIIIAndIIIMember_019e683f-9fca-73ac-883f-b8421fe682d0" xlink:href="rnr-20260630.xsd#rnr_InvestorsOfUpsilonRFODiversifiedIIIAndIIIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_InvestorsOfUpsilonRFODiversifiedIIIAndIIIMember_019e683f-9fca-73ac-883f-b8421fe682d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReHoldingsLtd.Member_019e683f-9fca-72c1-a70c-955bc84d2d51" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReHoldingsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_RenaissanceReHoldingsLtd.Member_019e683f-9fca-72c1-a70c-955bc84d2d51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_InvestorsOfUpsilonRFODiversifiedIVMember_019e683f-9fca-7752-9581-fa8bf3f50d2b" xlink:href="rnr-20260630.xsd#rnr_InvestorsOfUpsilonRFODiversifiedIVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_InvestorsOfUpsilonRFODiversifiedIVMember_019e683f-9fca-7752-9581-fa8bf3f50d2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestorMember_019e683f-9fca-7d7e-b0ee-d54b338fb01e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_us-gaap_InvestorMember_019e683f-9fca-7d7e-b0ee-d54b338fb01e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReinsuranceLtd.Member_019e6840-0829-714c-b005-16fac1e9e6ca" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReinsuranceLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e683f-9fca-7fd2-9f08-bad03428df56" xlink:to="loc_rnr_RenaissanceReinsuranceLtd.Member_019e6840-0829-714c-b005-16fac1e9e6ca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e683f-9fca-71c6-8914-10d6b21402e4_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:to="loc_dei_EntityDomain_019e683f-9fca-71c6-8914-10d6b21402e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e683f-9fca-71c6-8914-10d6b21402e4" xlink:to="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_UpsilonRFOReLtd.Member_019e683f-9fcb-7410-b353-3158e0c1b443" xlink:href="rnr-20260630.xsd#rnr_UpsilonRFOReLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_UpsilonRFOReLtd.Member_019e683f-9fcb-7410-b353-3158e0c1b443" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-7864-a53f-814831e5c2f1" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReUpsilonDiversifiedFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-7864-a53f-814831e5c2f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NOC1Member_019e683f-d2ea-78a7-b317-a5f724f6ce01" xlink:href="rnr-20260630.xsd#rnr_NOC1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_NOC1Member_019e683f-d2ea-78a7-b317-a5f724f6ce01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_StratosMember_019e683f-d2ea-75fc-a7d6-51bd4919272b" xlink:href="rnr-20260630.xsd#rnr_StratosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_StratosMember_019e683f-d2ea-75fc-a7d6-51bd4919272b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_MonaLisaReMember_019e6840-0829-7016-bae1-d561df94f9e4" xlink:href="rnr-20260630.xsd#rnr_MonaLisaReMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_MonaLisaReMember_019e6840-0829-7016-bae1-d561df94f9e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-710d-836d-9ac3e79c4d2e" xlink:href="rnr-20260630.xsd#rnr_AlphaCatManagersLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e683f-9fca-7f5d-b302-89186fef48f0" xlink:to="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-710d-836d-9ac3e79c4d2e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-725d-b4fd-a4a693042862_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-725d-b4fd-a4a693042862_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e683f-9fcb-725d-b4fd-a4a693042862" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-76d4-a606-71f3d7dfefdd" xlink:href="rnr-20260630.xsd#rnr_RenaissanceReUpsilonDiversifiedFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_RenaissanceReUpsilonDiversifiedFundMember_019e683f-9fcb-76d4-a606-71f3d7dfefdd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NOC1Member_019e683f-d2ea-70a2-9e9f-66569bc2873e" xlink:href="rnr-20260630.xsd#rnr_NOC1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_NOC1Member_019e683f-d2ea-70a2-9e9f-66569bc2873e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-7ca7-9c2e-f998d3574c13" xlink:href="rnr-20260630.xsd#rnr_AlphaCatManagersLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_AlphaCatManagersLtdMember_019e6840-0829-7ca7-9c2e-f998d3574c13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_UpsilonRFOReLtd.Member_019e687f-d7e7-7f9e-81d3-c7b1e91034ad" xlink:href="rnr-20260630.xsd#rnr_UpsilonRFOReLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e683f-9fcb-7e37-a80b-59c068b6e2f8" xlink:to="loc_rnr_UpsilonRFOReLtd.Member_019e687f-d7e7-7f9e-81d3-c7b1e91034ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e2bd0-cb56-7be4-a2b7-feb02c9f10b2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-7ae1-9271-5403dd19a746_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:to="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-7ae1-9271-5403dd19a746_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-739c-b2b8-bc96cb37b4df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e683f-d2ea-7ae1-9271-5403dd19a746" xlink:to="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-739c-b2b8-bc96cb37b4df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_019e683f-d2ea-783c-a7b5-691ac5c45f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e683f-d2ea-739c-b2b8-bc96cb37b4df" xlink:to="loc_us-gaap_PreferredStockMember_019e683f-d2ea-783c-a7b5-691ac5c45f8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NumberOfSegregatedAccounts_019e683f-72bd-79a1-bf80-25e96108a8f1" xlink:href="rnr-20260630.xsd#rnr_NumberOfSegregatedAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_rnr_NumberOfSegregatedAccounts_019e683f-72bd-79a1-bf80-25e96108a8f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfCapitalDistribution_019e683f-9fcb-789b-b4ee-1cac2175cf20" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfCapitalDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_PaymentsOfCapitalDistribution_019e683f-9fcb-789b-b4ee-1cac2175cf20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e683f-9fcb-7147-ba95-9938f9afa989" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_Assets_019e683f-9fcb-7147-ba95-9938f9afa989" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e683f-9fcb-7e33-813f-1dff2b742660" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_Liabilities_019e683f-9fcb-7e33-813f-1dff2b742660" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e683f-9fcb-7ab2-adb5-c52ddb145370" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_Investments_019e683f-9fcb-7ab2-adb5-c52ddb145370" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019e683f-9fcb-7cf7-a4ae-1f23aea275d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_OtherAssets_019e683f-9fcb-7cf7-a4ae-1f23aea275d2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e683f-9fcb-7724-8055-e56f57d240af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e683f-9fcb-7724-8055-e56f57d240af" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019e683f-9fcb-7f43-a792-4a84c1c27bca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_OtherLiabilities_019e683f-9fcb-7f43-a792-4a84c1c27bca" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNet_019e683f-9fcb-7654-951a-dbc433d70d73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_AssetsNet_019e683f-9fcb-7654-951a-dbc433d70d73" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityOwnershipPercentage_019e683f-9fcb-7c4b-972c-cc377c22cb75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_VariableInterestEntityOwnershipPercentage_019e683f-9fcb-7c4b-972c-cc377c22cb75" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019e683f-9fcb-7b23-8d98-184b08d0e50d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_EquityMethodInvestments_019e683f-9fcb-7b23-8d98-184b08d0e50d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_019e683f-d2ea-7ff8-8d99-baacaa28bc74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_019e683f-d2ea-7ff8-8d99-baacaa28bc74" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_019e683f-d2ea-75b9-904d-1be1eefc11a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates_019e683f-d2ea-75b9-904d-1be1eefc11a2" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsWritten_019e6840-0829-732a-aae9-9b6c05bbc384" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededPremiumsWritten"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_CededPremiumsWritten_019e6840-0829-732a-aae9-9b6c05bbc384" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsEarned_019e6840-0829-7eb4-a0e8-e9dec8aeed13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_us-gaap_CededPremiumsEarned_019e6840-0829-7eb4-a0e8-e9dec8aeed13" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_VariableInterestEntityInvestmentInParticipatingNotes_019e6840-0829-7690-91d8-19f12641c3d7" xlink:href="rnr-20260630.xsd#rnr_VariableInterestEntityInvestmentInParticipatingNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e683f-72bd-7690-a85e-a274425633dd" xlink:to="loc_rnr_VariableInterestEntityInvestmentInParticipatingNotes_019e6840-0829-7690-91d8-19f12641c3d7" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/SHAREHOLDERSEQUITYDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#SHAREHOLDERSEQUITYDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/SHAREHOLDERSEQUITYDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019e2bd0-cb56-7aca-b5ab-0ca4c1f7f866" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019e2bd0-cb56-7aca-b5ab-0ca4c1f7f866" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-71f1-82d4-e383f95f7e85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019e2bd0-cb56-7aca-b5ab-0ca4c1f7f866" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-71f1-82d4-e383f95f7e85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-71f1-82d4-e383f95f7e85_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-71f1-82d4-e383f95f7e85" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-71f1-82d4-e383f95f7e85_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cb56-71f1-82d4-e383f95f7e85" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesFPreferredStockMember_019e2bd0-cb56-7421-bd6a-c76b7e8df28a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeriesFPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:to="loc_us-gaap_SeriesFPreferredStockMember_019e2bd0-cb56-7421-bd6a-c76b7e8df28a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_SeriesFPreferredSharesDepositarySharesMember_019e2bd0-cb56-74e2-9b95-1fe496209dec" xlink:href="rnr-20260630.xsd#rnr_SeriesFPreferredSharesDepositarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:to="loc_rnr_SeriesFPreferredSharesDepositarySharesMember_019e2bd0-cb56-74e2-9b95-1fe496209dec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesGPreferredStockMember_019e2bd0-cb56-7e86-9a0b-67e2ecb1ee1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeriesGPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:to="loc_us-gaap_SeriesGPreferredStockMember_019e2bd0-cb56-7e86-9a0b-67e2ecb1ee1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_SeriesGPreferredSharesDepositarySharesMember_019e2bd0-cb56-735f-8ad8-ed07ab85d57a" xlink:href="rnr-20260630.xsd#rnr_SeriesGPreferredSharesDepositarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:to="loc_rnr_SeriesGPreferredSharesDepositarySharesMember_019e2bd0-cb56-735f-8ad8-ed07ab85d57a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-cb56-724b-9f28-4a8b07d912dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cb56-7f89-9bff-5c4418ae2bf0" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-cb56-724b-9f28-4a8b07d912dd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019e2bd0-cb56-71f2-b63b-ae392eb81c98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019e2bd0-cb56-71f2-b63b-ae392eb81c98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_019e2bd0-cb56-760b-9377-867af6f8bff2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_019e2bd0-cb56-760b-9377-867af6f8bff2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PreferredStockLiquidationPreferencePerSharePerAnnum_019e2bd0-cb56-7d5b-bad3-273b0073a2de" xlink:href="rnr-20260630.xsd#rnr_PreferredStockLiquidationPreferencePerSharePerAnnum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_rnr_PreferredStockLiquidationPreferencePerSharePerAnnum_019e2bd0-cb56-7d5b-bad3-273b0073a2de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PreferredStockLiquidationPreferencePerShareQuarterly_019e2bd0-cb56-7deb-9f96-a03eaab12549" xlink:href="rnr-20260630.xsd#rnr_PreferredStockLiquidationPreferencePerShareQuarterly"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_rnr_PreferredStockLiquidationPreferencePerShareQuarterly_019e2bd0-cb56-7deb-9f96-a03eaab12549" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStock_019e2bd0-cb56-7559-b184-0183cea65dc5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_DividendsPreferredStock_019e2bd0-cb56-7559-b184-0183cea65dc5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_019e2bd0-cb56-7b9c-93c4-168a84f0c216" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_DividendsCommonStock_019e2bd0-cb56-7b9c-93c4-168a84f0c216" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019e2bd0-cb56-7b00-975c-baf12d7d12c0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019e2bd0-cb56-7b00-975c-baf12d7d12c0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019e2bd0-cb56-7a5b-afa5-93777a999cbd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019e2bd0-cb56-7a5b-afa5-93777a999cbd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019e2bd0-cb56-7e14-99e4-5f8e0e84e1f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019e2bd0-cb56-7e14-99e4-5f8e0e84e1f2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019e2bd0-cb56-7a92-8ea7-97ee17298fac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019e2bd0-cb56-7a92-8ea7-97ee17298fac" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019e2bd0-cb56-7ff9-a6cf-5ab3235d6d11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019e2bd0-cb56-7a40-93fb-afc5f451f64a" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019e2bd0-cb56-7ff9-a6cf-5ab3235d6d11" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/SEGMENTREPORTINGDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#SEGMENTREPORTINGDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/SEGMENTREPORTINGDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e2bd0-cc1c-785a-a89b-63eb247fbc9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e2bd0-cc1c-785a-a89b-63eb247fbc9d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cc1c-73f6-8a93-4b5ef3fe168e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e2bd0-cc1c-785a-a89b-63eb247fbc9d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cc1c-73f6-8a93-4b5ef3fe168e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e2bd0-cc1c-73f6-8a93-4b5ef3fe168e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cc1c-73f6-8a93-4b5ef3fe168e" xlink:to="loc_us-gaap_SegmentDomain_019e2bd0-cc1c-73f6-8a93-4b5ef3fe168e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e2bd0-cc1c-7a28-8d92-9fbce77485e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e2bd0-cc1c-73f6-8a93-4b5ef3fe168e" xlink:to="loc_us-gaap_SegmentDomain_019e2bd0-cc1c-7a28-8d92-9fbce77485e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_PropertySegmentMember_019e2bd0-cc1c-7e89-907f-67cf705f2cd6" xlink:href="rnr-20260630.xsd#rnr_PropertySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e2bd0-cc1c-7a28-8d92-9fbce77485e3" xlink:to="loc_rnr_PropertySegmentMember_019e2bd0-cc1c-7e89-907f-67cf705f2cd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CasualtyandSpecialtySegmentMember_019e2bd0-cc1c-73cb-8e96-6542dd76fa8f" xlink:href="rnr-20260630.xsd#rnr_CasualtyandSpecialtySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e2bd0-cc1c-7a28-8d92-9fbce77485e3" xlink:to="loc_rnr_CasualtyandSpecialtySegmentMember_019e2bd0-cc1c-73cb-8e96-6542dd76fa8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e2bd0-cc1c-7b21-8af2-898886f77a8a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e2bd0-cc1c-785a-a89b-63eb247fbc9d" xlink:to="loc_srt_ConsolidationItemsAxis_019e2bd0-cc1c-7b21-8af2-898886f77a8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e2bd0-cc1c-7b21-8af2-898886f77a8a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e2bd0-cc1c-7b21-8af2-898886f77a8a" xlink:to="loc_srt_ConsolidationItemsDomain_019e2bd0-cc1c-7b21-8af2-898886f77a8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e2bd0-cc1c-701d-b62b-934fdb1be960" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e2bd0-cc1c-7b21-8af2-898886f77a8a" xlink:to="loc_srt_ConsolidationItemsDomain_019e2bd0-cc1c-701d-b62b-934fdb1be960" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e2bd0-cc1c-75af-985c-15caf14825df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e2bd0-cc1c-701d-b62b-934fdb1be960" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e2bd0-cc1c-75af-985c-15caf14825df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019e2bd0-cc1c-7741-ad05-869b5adfab06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e2bd0-cc1c-701d-b62b-934fdb1be960" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019e2bd0-cc1c-7741-ad05-869b5adfab06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenGross_019e2bd0-cc1c-7e4d-b580-83c7ddfae440" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsWrittenGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_PremiumsWrittenGross_019e2bd0-cc1c-7e4d-b580-83c7ddfae440" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenNet_019e2bd0-cc1c-7fea-b8bb-8929d053d298" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsWrittenNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_PremiumsWrittenNet_019e2bd0-cc1c-7fea-b8bb-8929d053d298" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_019e2bd0-cc1c-782d-aa74-f1c5788ff010" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_PremiumsEarnedNet_019e2bd0-cc1c-782d-aa74-f1c5788ff010" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_019e2bd0-cc1c-703f-aa18-1b30477fd28f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_019e2bd0-cc1c-703f-aa18-1b30477fd28f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_019e2bd0-cc1c-73ef-b659-7f84cefbfe4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_019e2bd0-cc1c-73ef-b659-7f84cefbfe4f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_019e2bd0-cc1c-70e7-8792-940d3b8fa5d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_OperatingCostsAndExpenses_019e2bd0-cc1c-70e7-8792-940d3b8fa5d8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_UnderwritingIncomeLossNet_019e2bd0-cc1c-7d07-9a14-0df1c0083e68" xlink:href="rnr-20260630.xsd#rnr_UnderwritingIncomeLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_rnr_UnderwritingIncomeLossNet_019e2bd0-cc1c-7d07-9a14-0df1c0083e68" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_019e2bd0-cc1c-7108-b91f-deeb91aab893" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_NetInvestmentIncome_019e2bd0-cc1c-7108-b91f-deeb91aab893" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019e2bd0-cc1c-7020-9188-f1121d27866f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019e2bd0-cc1c-7020-9188-f1121d27866f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e2bd0-cc1c-7749-9c87-71add695d89a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e2bd0-cc1c-7749-9c87-71add695d89a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_019e2bd0-cc1c-7301-b8c4-90a44becca4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_019e2bd0-cc1c-7301-b8c4-90a44becca4c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingGainsLosses_019e2bd0-cc1c-71d2-a936-03d1cae5e3c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_NonoperatingGainsLosses_019e2bd0-cc1c-71d2-a936-03d1cae5e3c6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019e2bd0-cc1c-7e26-b7cc-3ec5d44cd494" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019e2bd0-cc1c-7e26-b7cc-3ec5d44cd494" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019e2bd0-cc1c-758a-8d77-b8fc290b35df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019e2bd0-cc1c-758a-8d77-b8fc290b35df" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e2bd0-cc1c-7114-8ac5-3f213867c0a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e2bd0-cc1c-7114-8ac5-3f213867c0a5" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e2bd0-cc1c-7032-bec9-4a1e06345444" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e2bd0-cc1c-7032-bec9-4a1e06345444" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-cc1c-713a-95eb-25a1e4f57e91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019e2bd0-cc1c-713a-95eb-25a1e4f57e91" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStock_019e2bd0-cc1c-797c-a257-e8329603f2b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_DividendsPreferredStock_019e2bd0-cc1c-797c-a257-e8329603f2b2" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e2bd0-cc1c-70c4-ab40-67f9e2cdccac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e2bd0-cc1c-70c4-ab40-67f9e2cdccac" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_019e2bd0-cc1c-7239-9735-95522b271b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_019e2bd0-cc1c-7239-9735-95522b271b1b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019e2bd0-cc1c-73e0-af3f-0ee1c5f5c551" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019e2bd0-cc1c-73e0-af3f-0ee1c5f5c551" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_019e2bd0-cc1c-7b51-b582-e2e8d98bc0c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_019e2bd0-cc1c-7b51-b582-e2e8d98bc0c7" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NetClaimsAndClaimsExpenseRatioCurrentYear_019e2bd0-cc1c-79aa-9b73-71d33acb5485" xlink:href="rnr-20260630.xsd#rnr_NetClaimsAndClaimsExpenseRatioCurrentYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_rnr_NetClaimsAndClaimsExpenseRatioCurrentYear_019e2bd0-cc1c-79aa-9b73-71d33acb5485" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_NetClaimsAndClaimExpenseRatioPriorYears_019e2bd0-cc1c-73fc-8ac7-aab49938ab4f" xlink:href="rnr-20260630.xsd#rnr_NetClaimsAndClaimExpenseRatioPriorYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_rnr_NetClaimsAndClaimExpenseRatioPriorYears_019e2bd0-cc1c-73fc-8ac7-aab49938ab4f" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossRatio_019e2bd0-cc1c-786b-808f-2bd4f3ff5bb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_LossRatio_019e2bd0-cc1c-786b-808f-2bd4f3ff5bb7" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnderwritingExpenseRatio_019e2bd0-cc1c-7798-bb63-a07a906742f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnderwritingExpenseRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_UnderwritingExpenseRatio_019e2bd0-cc1c-7798-bb63-a07a906742f9" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CombinedRatio_019e2bd0-cc1c-71a7-81b4-6b48fab54b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CombinedRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e2bd0-cc1c-7715-ba38-637b3f14a38d" xlink:to="loc_us-gaap_CombinedRatio_019e2bd0-cc1c-71a7-81b4-6b48fab54b6d" xlink:type="arc" order="26"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofGrossandNetAmountsofRecognizedDerivativeAssetsandLiabilitiesatFairValueDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#DERIVATIVEINSTRUMENTSScheduleofGrossandNetAmountsofRecognizedDerivativeAssetsandLiabilitiesatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofGrossandNetAmountsofRecognizedDerivativeAssetsandLiabilitiesatFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e2bd0-cc1c-7de1-a740-6408acb4188b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e2bd0-cc1c-75a1-8dcc-9bff45e03bee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e2bd0-cc1c-7de1-a740-6408acb4188b" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e2bd0-cc1c-75a1-8dcc-9bff45e03bee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7f21-b250-47b8f963efc0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e2bd0-cc1c-75a1-8dcc-9bff45e03bee" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7f21-b250-47b8f963efc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7f21-b250-47b8f963efc0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7f21-b250-47b8f963efc0" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7f21-b250-47b8f963efc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7041-a67c-5201474bc2f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7f21-b250-47b8f963efc0" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7041-a67c-5201474bc2f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-78a7-9d61-c37010e2fc70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7041-a67c-5201474bc2f1" xlink:to="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-78a7-9d61-c37010e2fc70" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-7291-8444-af2382b859f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7041-a67c-5201474bc2f1" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-7291-8444-af2382b859f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-72f5-b97a-bfddd39fa4df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e2bd0-cc1c-75a1-8dcc-9bff45e03bee" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-72f5-b97a-bfddd39fa4df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-72f5-b97a-bfddd39fa4df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-72f5-b97a-bfddd39fa4df" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-72f5-b97a-bfddd39fa4df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-72f5-b97a-bfddd39fa4df" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-7a4d-ba62-827ec00b8dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-7a4d-ba62-827ec00b8dd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-79fa-bafc-925788c0b1aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-79fa-bafc-925788c0b1aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-79c7-a3cb-28a717eaa2ad" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-79c7-a3cb-28a717eaa2ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-71e5-8a1f-b5ad763797fc" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-71e5-8a1f-b5ad763797fc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-74fe-b2ab-06deda0e6528" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditDefaultSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-74fe-b2ab-06deda0e6528" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7b1e-8436-48768cec5c23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7b1e-8436-48768cec5c23" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-7acc-9383-2a64797250c4" xlink:href="rnr-20260630.xsd#rnr_CommodityFuturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7d9d-8ee5-40ed04e57e01" xlink:to="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-7acc-9383-2a64797250c4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e2bd0-cc1c-7de1-a740-6408acb4188b" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration_019e2bd0-cc1c-7135-8555-f291456001bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:to="loc_us-gaap_DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration_019e2bd0-cc1c-7135-8555-f291456001bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e2bd0-cc1c-7afa-a5d1-2f4013e42e50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e2bd0-cc1c-7afa-a5d1-2f4013e42e50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_019e2bd0-cc1c-7140-9693-34ad09395c6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:to="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_019e2bd0-cc1c-7140-9693-34ad09395c6a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e2bd0-cc1c-7c09-a644-2358c92cba98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:to="loc_us-gaap_DerivativeAssets_019e2bd0-cc1c-7c09-a644-2358c92cba98" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralObligationToReturnCash_019e2bd0-cc1c-7512-b269-814d7ed6d164" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeCollateralObligationToReturnCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:to="loc_us-gaap_DerivativeCollateralObligationToReturnCash_019e2bd0-cc1c-7512-b269-814d7ed6d164" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_019e2bd0-cc1c-7fd6-8911-8bb0294ceda6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e2bd0-cc1c-7ac6-b0db-575dad84a581" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_019e2bd0-cc1c-7fd6-8911-8bb0294ceda6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e2bd0-cc1c-7de1-a740-6408acb4188b" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_019e2bd0-cc1c-7f1b-a7e1-ed1e9d9309d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:to="loc_us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_019e2bd0-cc1c-7f1b-a7e1-ed1e9d9309d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e2bd0-cc1c-747e-b71f-d7d75a73a4e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e2bd0-cc1c-747e-b71f-d7d75a73a4e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_019e2bd0-cc1c-7903-a267-4521515e1fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:to="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_019e2bd0-cc1c-7903-a267-4521515e1fe8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e2bd0-cc1c-715f-925f-0cc61ece4208" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:to="loc_us-gaap_DerivativeLiabilities_019e2bd0-cc1c-715f-925f-0cc61ece4208" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralRightToReclaimCash_019e2bd0-cc1c-7028-b243-4477a16ae496" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeCollateralRightToReclaimCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:to="loc_us-gaap_DerivativeCollateralRightToReclaimCash_019e2bd0-cc1c-7028-b243-4477a16ae496" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019e2bd0-cc1c-7329-b856-282592f84848" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e2bd0-cc1c-7cc9-85f2-9e71291e23b9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019e2bd0-cc1c-7329-b856-282592f84848" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofDerivativeContractsDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#DERIVATIVEINSTRUMENTSScheduleofDerivativeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofDerivativeContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019e2bd0-cc1c-79e6-a105-515c761381de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-7b6c-82c8-8b7ec3ac221f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019e2bd0-cc1c-79e6-a105-515c761381de" xlink:to="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-7b6c-82c8-8b7ec3ac221f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-74d5-b9fe-012b6f913014" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-7b6c-82c8-8b7ec3ac221f" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-74d5-b9fe-012b6f913014" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-74d5-b9fe-012b6f913014_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-74d5-b9fe-012b6f913014" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-74d5-b9fe-012b6f913014_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-74d5-b9fe-012b6f913014" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-7658-a16c-111fcc899954" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-7658-a16c-111fcc899954" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-794b-9f0e-ab70a55f49f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-794b-9f0e-ab70a55f49f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-76c3-86df-ec0ff891b033" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-76c3-86df-ec0ff891b033" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-70b5-9c07-cff2d1a49010" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-70b5-9c07-cff2d1a49010" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-71dd-b00a-e4a9f47adb64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditDefaultSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-71dd-b00a-e4a9f47adb64" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7c0e-a4e3-66c93d49a617" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7c0e-a4e3-66c93d49a617" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-76cf-a26c-91713192c905" xlink:href="rnr-20260630.xsd#rnr_CommodityFuturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-76cf-a26c-91713192c905" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityOptionMember_019e2bd0-cc1c-7abc-b4b0-cab7a4b98542" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7826-adbd-b47dda2562ea" xlink:to="loc_us-gaap_CommodityOptionMember_019e2bd0-cc1c-7abc-b4b0-cab7a4b98542" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7ced-b92e-99043a5a1468" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-7b6c-82c8-8b7ec3ac221f" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7ced-b92e-99043a5a1468" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7ced-b92e-99043a5a1468_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7ced-b92e-99043a5a1468" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7ced-b92e-99043a5a1468_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7831-be4d-aa10e9a2a014" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7ced-b92e-99043a5a1468" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7831-be4d-aa10e9a2a014" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-79a3-b1b2-b382410f504a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7831-be4d-aa10e9a2a014" xlink:to="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-79a3-b1b2-b382410f504a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-757e-ba12-b05a5eb5bb24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7831-be4d-aa10e9a2a014" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-757e-ba12-b05a5eb5bb24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_019e2bd0-cc1c-765d-9fe3-951313b9330b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-7b6c-82c8-8b7ec3ac221f" xlink:to="loc_us-gaap_PositionAxis_019e2bd0-cc1c-765d-9fe3-951313b9330b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019e2bd0-cc1c-765d-9fe3-951313b9330b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_019e2bd0-cc1c-765d-9fe3-951313b9330b" xlink:to="loc_us-gaap_PositionDomain_019e2bd0-cc1c-765d-9fe3-951313b9330b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019e2bd0-cc1c-7419-91f4-75613cffc6ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_019e2bd0-cc1c-765d-9fe3-951313b9330b" xlink:to="loc_us-gaap_PositionDomain_019e2bd0-cc1c-7419-91f4-75613cffc6ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongMember_019e2bd0-cc1c-7813-a5e4-50006755fc29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019e2bd0-cc1c-7419-91f4-75613cffc6ec" xlink:to="loc_us-gaap_LongMember_019e2bd0-cc1c-7813-a5e4-50006755fc29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_019e2bd0-cc1c-796d-89fb-c95868965842" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019e2bd0-cc1c-7419-91f4-75613cffc6ec" xlink:to="loc_us-gaap_ShortMember_019e2bd0-cc1c-796d-89fb-c95868965842" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e2bd0-cc1c-7949-85d1-cec716df2aa7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e2bd0-cc1c-79e6-a105-515c761381de" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e2bd0-cc1c-7949-85d1-cec716df2aa7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofLocationandAmountoftheGainLossRecognizedDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#DERIVATIVEINSTRUMENTSScheduleofLocationandAmountoftheGainLossRecognizedDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofLocationandAmountoftheGainLossRecognizedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-763d-b1c9-f361fc07c709_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-763d-b1c9-f361fc07c709_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-73c5-be1b-38e2f4d1a128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:to="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-73c5-be1b-38e2f4d1a128" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-7858-b55a-08170f3510b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-7858-b55a-08170f3510b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7208-92f8-d9d7fcec4682_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7208-92f8-d9d7fcec4682_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:href="rnr-20260630.xsd#rnr_FixedMaturityInvestmentRelatedDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-772c-8234-f5877698a8e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:to="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-772c-8234-f5877698a8e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-7742-9161-f922079cdb64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditDefaultSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:to="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-7742-9161-f922079cdb64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-7579-9b30-1bd5a10ef0fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:to="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-7579-9b30-1bd5a10ef0fe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_EquityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-764d-806a-252c6fcdd11a" xlink:href="rnr-20260630.xsd#rnr_EquityInvestmentRelatedDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_EquityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-764d-806a-252c6fcdd11a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7fe7-bab9-caccc54a60d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_EquityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-764d-806a-252c6fcdd11a" xlink:to="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7fe7-bab9-caccc54a60d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-7ee1-b43f-c70821356ab4" xlink:href="rnr-20260630.xsd#rnr_CommodityFuturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:to="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-7ee1-b43f-c70821356ab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityOptionMember_019e2bd0-cc1c-73e9-8462-0db6d1739024" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:to="loc_us-gaap_CommodityOptionMember_019e2bd0-cc1c-73e9-8462-0db6d1739024" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-7338-b9cf-cf21d9d30d1a" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-7338-b9cf-cf21d9d30d1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-7247-8715-d9fe0d16cd74" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-7247-8715-d9fe0d16cd74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e2bd0-cc1c-7bbf-be6e-5f70d0e01911" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e2bd0-cc1c-7bbf-be6e-5f70d0e01911" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e2bd0-cc1c-79bb-bd3d-71accff00746" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e2bd0-cc1c-79bb-bd3d-71accff00746" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019e2bd0-cc1c-7b54-9ca2-3ed70d216e17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019e2bd0-cc1c-7b54-9ca2-3ed70d216e17" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofLocationandAmountoftheGainLossRecognizedDetails_1" xlink:type="simple" xlink:href="rnr-20260630.xsd#DERIVATIVEINSTRUMENTSScheduleofLocationandAmountoftheGainLossRecognizedDetails_1"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DERIVATIVEINSTRUMENTSScheduleofLocationandAmountoftheGainLossRecognizedDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-763d-b1c9-f361fc07c709_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-763d-b1c9-f361fc07c709_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-763d-b1c9-f361fc07c709" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-73c5-be1b-38e2f4d1a128" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:to="loc_us-gaap_NondesignatedMember_019e2bd0-cc1c-73c5-be1b-38e2f4d1a128" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-7858-b55a-08170f3510b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7b2d-a442-90d1ae5a9a2a" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-7858-b55a-08170f3510b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e2bd0-cc1c-7dd4-8e3c-f67b76a89224" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7208-92f8-d9d7fcec4682_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7208-92f8-d9d7fcec4682_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-7208-92f8-d9d7fcec4682" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:href="rnr-20260630.xsd#rnr_FixedMaturityInvestmentRelatedDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-772c-8234-f5877698a8e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:to="loc_us-gaap_InterestRateContractMember_019e2bd0-cc1c-772c-8234-f5877698a8e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-7742-9161-f922079cdb64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditDefaultSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:to="loc_us-gaap_CreditDefaultSwapMember_019e2bd0-cc1c-7742-9161-f922079cdb64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-7579-9b30-1bd5a10ef0fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_FixedMaturityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-7c5c-9f37-894d4ad94193" xlink:to="loc_us-gaap_InterestRateSwapMember_019e2bd0-cc1c-7579-9b30-1bd5a10ef0fe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_EquityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-764d-806a-252c6fcdd11a" xlink:href="rnr-20260630.xsd#rnr_EquityInvestmentRelatedDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_EquityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-764d-806a-252c6fcdd11a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7fe7-bab9-caccc54a60d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rnr_EquityInvestmentRelatedDerivativesMember_019e2bd0-cc1c-764d-806a-252c6fcdd11a" xlink:to="loc_us-gaap_EquityContractMember_019e2bd0-cc1c-7fe7-bab9-caccc54a60d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-7ee1-b43f-c70821356ab4" xlink:href="rnr-20260630.xsd#rnr_CommodityFuturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:to="loc_rnr_CommodityFuturesMember_019e2bd0-cc1c-7ee1-b43f-c70821356ab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityOptionMember_019e2bd0-cc1c-73e9-8462-0db6d1739024" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommodityOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CommodityMember_019e2bd0-cc1c-739a-80f8-cc5f51175053" xlink:to="loc_us-gaap_CommodityOptionMember_019e2bd0-cc1c-73e9-8462-0db6d1739024" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-7338-b9cf-cf21d9d30d1a" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_ForeignCurrencyForwardContractsUnderwritingAndNonInvestmentOperationsMember_019e2bd0-cc1c-7338-b9cf-cf21d9d30d1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-7247-8715-d9fe0d16cd74" xlink:href="rnr-20260630.xsd#rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-76b3-91a4-5dbeb945ccf8" xlink:to="loc_rnr_ForeignCurrencyForwardContractsInvestmentOperationsMember_019e2bd0-cc1c-7247-8715-d9fe0d16cd74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e2bd0-cc1c-79bb-bd3d-71accff00746" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e2bd0-cc1c-79bb-bd3d-71accff00746" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019e2bd0-cc1c-7b54-9ca2-3ed70d216e17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e2bd0-cc1c-703f-a8e7-d536664bbdb1" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019e2bd0-cc1c-7b54-9ca2-3ed70d216e17" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#DERIVATIVEINSTRUMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019e2bd0-cc1c-701e-876d-14b071d4d9b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-75f6-bae6-6b3545494859" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019e2bd0-cc1c-701e-876d-14b071d4d9b0" xlink:to="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-75f6-bae6-6b3545494859" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-73ca-8c0e-7376cb132be6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-75f6-bae6-6b3545494859" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-73ca-8c0e-7376cb132be6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-73ca-8c0e-7376cb132be6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-73ca-8c0e-7376cb132be6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-73ca-8c0e-7376cb132be6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7cb3-ac13-223c578f20e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e2bd0-cc1c-73ca-8c0e-7376cb132be6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7cb3-ac13-223c578f20e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019e2bd0-cc1c-7bca-bf59-f8a081a15611" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e2bd0-cc1c-7cb3-ac13-223c578f20e5" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019e2bd0-cc1c-7bca-bf59-f8a081a15611" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e2bd0-cc1c-7ec6-94c6-fef92ab4cba3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-75f6-bae6-6b3545494859" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e2bd0-cc1c-7ec6-94c6-fef92ab4cba3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e2bd0-cc1c-7ec6-94c6-fef92ab4cba3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e2bd0-cc1c-7ec6-94c6-fef92ab4cba3" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e2bd0-cc1c-7ec6-94c6-fef92ab4cba3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e2bd0-cc1c-70f9-8cd9-0950934a8798" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e2bd0-cc1c-7ec6-94c6-fef92ab4cba3" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e2bd0-cc1c-70f9-8cd9-0950934a8798" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e2bd0-cc1c-7f27-a398-da421085e990" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e2bd0-cc1c-70f9-8cd9-0950934a8798" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e2bd0-cc1c-7f27-a398-da421085e990" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7bb2-bd05-7de26410b150" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e2bd0-cc1c-75f6-bae6-6b3545494859" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7bb2-bd05-7de26410b150" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7bb2-bd05-7de26410b150_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7bb2-bd05-7de26410b150" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7bb2-bd05-7de26410b150_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7fb9-b7de-7888893a2416" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e2bd0-cc1c-7bb2-bd05-7de26410b150" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7fb9-b7de-7888893a2416" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-777c-ad83-b9b9e9e57c21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e2bd0-cc1c-7fb9-b7de-7888893a2416" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e2bd0-cc1c-777c-ad83-b9b9e9e57c21" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_DerivativeWeightedAverageU.S.DollarEquivalentOfForeignDenominatedNetAssets_019e2bd0-cc1c-72c2-b05d-3ca4654f7acf" xlink:href="rnr-20260630.xsd#rnr_DerivativeWeightedAverageU.S.DollarEquivalentOfForeignDenominatedNetAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e2bd0-cc1c-701e-876d-14b071d4d9b0" xlink:to="loc_rnr_DerivativeWeightedAverageU.S.DollarEquivalentOfForeignDenominatedNetAssets_019e2bd0-cc1c-72c2-b05d-3ca4654f7acf" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.renre.com/role/SUBSEQUENTEVENTSDetails" xlink:type="simple" xlink:href="rnr-20260630.xsd#SUBSEQUENTEVENTSDetails"/>
  <link:definitionLink xlink:role="http://www.renre.com/role/SUBSEQUENTEVENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019e2bd0-cc1c-73c4-806d-d58c1c928dde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019e2bd0-cc1c-7d5f-a1a3-5a6413fc6e59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e2bd0-cc1c-73c4-806d-d58c1c928dde" xlink:to="loc_us-gaap_SubsequentEventTable_019e2bd0-cc1c-7d5f-a1a3-5a6413fc6e59" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cc1c-7ccd-84d9-e215cbcca5ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019e2bd0-cc1c-7d5f-a1a3-5a6413fc6e59" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cc1c-7ccd-84d9-e215cbcca5ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-cc1c-7ccd-84d9-e215cbcca5ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cc1c-7ccd-84d9-e215cbcca5ba" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-cc1c-7ccd-84d9-e215cbcca5ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e2bd0-cc1c-7baf-b359-ce312b3039a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e2bd0-cc1c-7ccd-84d9-e215cbcca5ba" xlink:to="loc_us-gaap_ClassOfStockDomain_019e2bd0-cc1c-7baf-b359-ce312b3039a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e2bd0-cc1c-70b3-9bc4-e7edeb080aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e2bd0-cc1c-7baf-b359-ce312b3039a9" xlink:to="loc_us-gaap_CommonStockMember_019e2bd0-cc1c-70b3-9bc4-e7edeb080aaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019ed65e-1eec-7068-8d59-6be8240b4e7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019e2bd0-cc1c-7d5f-a1a3-5a6413fc6e59" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019ed65e-1eec-7068-8d59-6be8240b4e7b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019ed65e-1eec-7068-8d59-6be8240b4e7b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019ed65e-1eec-7068-8d59-6be8240b4e7b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019ed65e-1eec-7068-8d59-6be8240b4e7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019ed65e-1eec-7bd7-b3dd-cc8cfd461be4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019ed65e-1eec-7068-8d59-6be8240b4e7b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019ed65e-1eec-7bd7-b3dd-cc8cfd461be4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019ed65e-4808-7841-8a18-ef429b864c58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019ed65e-1eec-7bd7-b3dd-cc8cfd461be4" xlink:to="loc_us-gaap_SubsequentEventMember_019ed65e-4808-7841-8a18-ef429b864c58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019e2bd0-cc1c-70dc-ae19-e37a3b3af7e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e2bd0-cc1c-73c4-806d-d58c1c928dde" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019e2bd0-cc1c-70dc-ae19-e37a3b3af7e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019e2bd0-cc1c-79a2-ad5c-115bc93d5d18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e2bd0-cc1c-73c4-806d-d58c1c928dde" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019e2bd0-cc1c-79a2-ad5c-115bc93d5d18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019e2bd0-cc1c-7f57-b3f9-19264f105957" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e2bd0-cc1c-73c4-806d-d58c1c928dde" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019e2bd0-cc1c-7f57-b3f9-19264f105957" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_rnr_RossCurtisMember_019f6fe3-526e-7e24-afe9-1fad3aad377a" xlink:href="rnr-20260630.xsd#rnr_RossCurtisMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_rnr_RossCurtisMember_019f6fe3-526e-7e24-afe9-1fad3aad377a" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
