<?xml version="1.0" encoding="US-ASCII"?>  
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->    
<!-- Created: Thu Apr 16 07:10:34 UTC 2026 -->  
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">  
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#ProspectusOnly" roleURI="http://xbrl.sec.gov/rr/role/ProspectusOnly"/>  
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#SeriesOnly" roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly"/>     
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#ClassOnly" roleURI="http://xbrl.sec.gov/oef/role/ClassOnly"/>   
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#RiskOnly" roleURI="http://xbrl.sec.gov/rr/role/RiskOnly"/>     
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#PerformanceMeasureOnly" roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly"/>   
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/> 
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>    
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>     
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>   
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>   
  <definitionLink xlink:role="http://xbrl.sec.gov/rr/role/ProspectusOnly" xlink:type="extended">  
    <loc xlink:type="locator" xlink:label="dei_DocumentDomain" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentDomain"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_AMERICAN_FRANCHISE_FUNDMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_AMERICAN_FRANCHISE_FUNDMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_AMERICAN_FRANCHISE_FUNDMember" order="11" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_AMERICAN_VALUE_FUNDMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_AMERICAN_VALUE_FUNDMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_AMERICAN_VALUE_FUNDMember" order="12" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_BalancedRisk_Allocation_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_BalancedRisk_Allocation_FundMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_BalancedRisk_Allocation_FundMember" order="13" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_COMSTOCK_FUNDMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_COMSTOCK_FUNDMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_COMSTOCK_FUNDMember" order="14" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Core_Equity_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Core_Equity_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Core_Equity_FundMember" order="15" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Core_Plus_Bond_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Core_Plus_Bond_FundMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Core_Plus_Bond_FundMember" order="16" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_Discovery_Large_Cap_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_Discovery_Large_Cap_FundMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_Discovery_Large_Cap_FundMember" order="17" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_Discovery_Mid_Cap_Growth_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_Discovery_Mid_Cap_Growth_FundMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_Discovery_Mid_Cap_Growth_FundMember" order="18" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Diversified_Dividend_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Diversified_Dividend_FundMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Diversified_Dividend_FundMember" order="19" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_EQUALLYWEIGHTED_SP_500_FUNDMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_EQUALLYWEIGHTED_SP_500_FUNDMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_EQUALLYWEIGHTED_SP_500_FUNDMember" order="20" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_EQUITY_AND_INCOME_FUNDMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_EQUITY_AND_INCOME_FUNDMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_EQUITY_AND_INCOME_FUNDMember" order="21" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_EQV_International_Equity_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_EQV_International_Equity_FundMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_EQV_International_Equity_FundMember" order="22" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_Global_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_Global_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_Global_FundMember" order="23" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Global_Real_Estate_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Global_Real_Estate_FundMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Global_Real_Estate_FundMember" order="24" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_Global_Strategic_Income_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_Global_Strategic_Income_FundMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_Global_Strategic_Income_FundMember" order="25" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Government_Money_Market_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Government_Money_Market_FundMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Government_Money_Market_FundMember" order="26" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Government_Securities_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Government_Securities_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Government_Securities_FundMember" order="27" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_GROWTH_AND_INCOME_FUNDMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_GROWTH_AND_INCOME_FUNDMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_GROWTH_AND_INCOME_FUNDMember" order="28" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Health_Care_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Health_Care_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Health_Care_FundMember" order="29" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_High_Yield_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_High_Yield_FundMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_High_Yield_FundMember" order="30" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_International_Growth_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_International_Growth_FundMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_International_Growth_FundMember" order="31" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_Main_Street_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_Main_Street_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_Main_Street_FundMember" order="32" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Main_Street_Mid_Cap_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Main_Street_Mid_Cap_FundMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Main_Street_Mid_Cap_FundMember" order="33" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_Main_Street_Small_Cap_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_Main_Street_Small_Cap_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_Main_Street_Small_Cap_FundMember" order="34" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_SeptemberMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_SeptemberMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_SeptemberMember" order="35" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_DecemberMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_DecemberMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_DecemberMember" order="36" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_MarchMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_MarchMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_MarchMember" order="37" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_JuneMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_JuneMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_InvescoR_VI_SP_500_Buffer_Fund_JuneMember" order="38" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Small_Cap_Equity_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Small_Cap_Equity_FundMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Small_Cap_Equity_FundMember" order="39" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_INVESCO_VI_Technology_FundMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_INVESCO_VI_Technology_FundMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_INVESCO_VI_Technology_FundMember" order="40" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_doc_Invesco_VI_US_Government_Money_PortfolioMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_doc_Invesco_VI_US_Government_Money_PortfolioMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000896435_doc_Invesco_VI_US_Government_Money_PortfolioMember" order="41" xbrldt:closed="true"/>    
  </definitionLink>     
  <definitionLink xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="extended">    
    <loc xlink:type="locator" xlink:label="dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027890Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027890Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027890Member" order="11" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027881Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027881Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027881Member" order="12" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000030663Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000030663Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000030663Member" order="13" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027872Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027872Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027872Member" order="14" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000203Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000203Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000203Member" order="15" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000205Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000205Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000205Member" order="16" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064654Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064654Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064654Member" order="17" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064658Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064658Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064658Member" order="18" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027871Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027871Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027871Member" order="19" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027889Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027889Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027889Member" order="20" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027873Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027873Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027873Member" order="21" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000182Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000182Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000182Member" order="22" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064660Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064660Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064660Member" order="23" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000187Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000187Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000187Member" order="24" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064661Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064661Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064661Member" order="25" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000185Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000185Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000185Member" order="26" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000179Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000179Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000179Member" order="27" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000027877Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000027877Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000027877Member" order="28" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000193Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000193Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000193Member" order="29" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000181Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000181Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000181Member" order="30" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064662Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064662Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064662Member" order="31" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064663Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064663Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064663Member" order="32" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000184Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000184Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000184Member" order="33" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064664Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064664Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064664Member" order="34" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000073046Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000073046Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000073046Member" order="35" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000073047Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000073047Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000073047Member" order="36" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000073048Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000073048Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000073048Member" order="37" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000073049Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000073049Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000073049Member" order="38" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000188Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000188Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000188Member" order="39" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000000196Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000000196Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000000196Member" order="40" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_S000064656Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_S000064656Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000896435_S000064656Member" order="41" xbrldt:closed="true"/>   
  </definitionLink>     
  <definitionLink xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="extended">   
    <loc xlink:type="locator" xlink:label="oef_ShareClassDomain" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_ShareClassDomain"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084677Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084677Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084677Member" order="11" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084678Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084678Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084678Member" order="12" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084659Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084659Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084659Member" order="13" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084660Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084660Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084660Member" order="14" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000095034Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000095034Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000095034Member" order="15" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000095035Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000095035Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000095035Member" order="16" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084641Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084641Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084641Member" order="17" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084642Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084642Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084642Member" order="18" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000452Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000452Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000452Member" order="19" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000453Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000453Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000453Member" order="20" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000456Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000456Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000456Member" order="21" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000457Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000457Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000457Member" order="22" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209356Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209356Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209356Member" order="23" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209355Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209355Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209355Member" order="24" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209364Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209364Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209364Member" order="25" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209363Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209363Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209363Member" order="26" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084639Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084639Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084639Member" order="27" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084640Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084640Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084640Member" order="28" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084675Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084675Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084675Member" order="29" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084676Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084676Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084676Member" order="30" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084643Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084643Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084643Member" order="31" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084644Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084644Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084644Member" order="32" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000410Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000410Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000410Member" order="33" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000411Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000411Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000411Member" order="34" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209368Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209368Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209368Member" order="35" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209367Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209367Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209367Member" order="36" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000420Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000420Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000420Member" order="37" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000421Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000421Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000421Member" order="38" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209370Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209370Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209370Member" order="39" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209369Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209369Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209369Member" order="40" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000416Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000416Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000416Member" order="41" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000417Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000417Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000417Member" order="42" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000404Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000404Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000404Member" order="43" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000405Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000405Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000405Member" order="44" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084651Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084651Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084651Member" order="45" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000084652Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000084652Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000084652Member" order="46" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000432Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000432Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000432Member" order="47" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000433Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000433Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000433Member" order="48" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000408Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000408Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000408Member" order="49" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000409Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000409Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000409Member" order="50" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209372Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209372Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209372Member" order="51" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209371Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209371Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209371Member" order="52" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209374Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209374Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209374Member" order="53" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209373Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209373Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209373Member" order="54" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000414Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000414Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000414Member" order="55" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000415Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000415Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000415Member" order="56" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209376Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209376Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209376Member" order="57" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209375Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209375Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209375Member" order="58" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229836Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229836Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229836Member" order="59" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229835Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229835Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229835Member" order="60" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229838Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229838Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229838Member" order="61" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229837Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229837Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229837Member" order="62" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229839Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229839Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229839Member" order="63" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229840Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229840Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229840Member" order="64" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229841Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229841Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229841Member" order="65" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000229842Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000229842Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000229842Member" order="66" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000422Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000422Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000422Member" order="67" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000423Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000423Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000423Member" order="68" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000438Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000438Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000438Member" order="69" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000000439Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000000439Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000000439Member" order="70" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209360Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209360Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209360Member" order="71" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_C000209359Member" xlink:href="ck0000896435-20260429.xsd#ck0000896435_C000209359Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000896435_C000209359Member" order="72" xbrldt:closed="true"/>  
  </definitionLink>     
  <definitionLink xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="extended"> 
    <loc xlink:type="locator" xlink:label="oef_AllRisksMember" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_AllRisksMember"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_MarketRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_MarketRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_MarketRiskMember" order="11" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_BufferedLossRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_BufferedLossRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_BufferedLossRiskMember" order="12" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_CappedReturnRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CappedReturnRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CappedReturnRiskMember" order="13" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_CapLevelChangeRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CapLevelChangeRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CapLevelChangeRiskMember" order="14" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_OutcomePeriodRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_OutcomePeriodRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_OutcomePeriodRiskMember" order="15" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_OptionsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_OptionsRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_OptionsRiskMember" order="16" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_FlexOptionsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_FlexOptionsRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_FlexOptionsRiskMember" order="17" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_HealthCareSectorRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_HealthCareSectorRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_HealthCareSectorRiskMember" order="18" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_RepurchaseAgreementRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_RepurchaseAgreementRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_RepurchaseAgreementRiskMember" order="19" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_YieldRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_YieldRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_YieldRiskMember" order="20" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_FloatingAndVariableRateObligationsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_FloatingAndVariableRateObligationsRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_FloatingAndVariableRateObligationsRiskMember" order="21" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_CorrelationRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CorrelationRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CorrelationRiskMember" order="22" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_InvestingInStocksRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_InvestingInStocksRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_InvestingInStocksRiskMember" order="23" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_SmallAndMidCapitalizationCompaniesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_SmallAndMidCapitalizationCompaniesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_SmallAndMidCapitalizationCompaniesRiskMember" order="24" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_RightsAndWarrantsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_RightsAndWarrantsRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_RightsAndWarrantsRiskMember" order="25" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_DebtSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_DebtSecuritiesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_DebtSecuritiesRiskMember" order="26" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_PreferredSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_PreferredSecuritiesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_PreferredSecuritiesRiskMember" order="27" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_ConvertibleSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ConvertibleSecuritiesRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ConvertibleSecuritiesRiskMember" order="28" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_CommodityRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CommodityRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CommodityRiskMember" order="29" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_CommoditiesTaxRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CommoditiesTaxRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CommoditiesTaxRiskMember" order="30" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_ChangingFixedIncomeMarketConditionsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ChangingFixedIncomeMarketConditionsRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ChangingFixedIncomeMarketConditionsRiskMember" order="31" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_ValueInvestingRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ValueInvestingRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ValueInvestingRiskMember" order="32" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_DividendRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_DividendRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_DividendRiskMember" order="33" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_MidCapitalizationCompaniesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_MidCapitalizationCompaniesRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_MidCapitalizationCompaniesRiskMember" order="34" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_IndexRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_IndexRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_IndexRiskMember" order="35" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_REITRiskRealEstateRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_REITRiskRealEstateRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_REITRiskRealEstateRiskMember" order="36" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_ActiveTradingRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ActiveTradingRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ActiveTradingRiskMember" order="37" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_GrowthInvestingRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_GrowthInvestingRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_GrowthInvestingRiskMember" order="38" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_SectorFocusRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_SectorFocusRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_SectorFocusRiskMember" order="39" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_LiquidityRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_LiquidityRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_LiquidityRiskMember" order="40" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_IssuerFocusRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_IssuerFocusRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_IssuerFocusRiskMember" order="41" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_ForeignInvestmentRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ForeignInvestmentRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ForeignInvestmentRiskMember" order="42" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_DepositaryReceiptsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_DepositaryReceiptsRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_DepositaryReceiptsRiskMember" order="43" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_DerivativesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_DerivativesRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_DerivativesRiskMember" order="44" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_OCCClearingMemberDefaultRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_OCCClearingMemberDefaultRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_OCCClearingMemberDefaultRiskMember" order="45" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_NonIndexingRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_NonIndexingRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_NonIndexingRiskMember" order="46" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_IndustryConcentrationRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_IndustryConcentrationRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_IndustryConcentrationRiskMember" order="47" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_TechnologySectorRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_TechnologySectorRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_TechnologySectorRiskMember" order="48" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_InflationIndexedSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_InflationIndexedSecuritiesRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_InflationIndexedSecuritiesRiskMember" order="49" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_NonCorrelationRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_NonCorrelationRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_NonCorrelationRiskMember" order="50" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_OperationalRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_OperationalRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_OperationalRiskMember" order="51" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_RedemptionRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_RedemptionRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_RedemptionRiskMember" order="52" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_EmergingMarketsInvestmentRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_EmergingMarketsInvestmentRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_EmergingMarketsInvestmentRiskMember" order="53" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_ForeignExposureRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ForeignExposureRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ForeignExposureRiskMember" order="54" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_GeographicFocusRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_GeographicFocusRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_GeographicFocusRiskMember" order="55" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_EuropeanInvestmentRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_EuropeanInvestmentRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_EuropeanInvestmentRiskMember" order="56" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_AsiaPacificRegionRiskincludingJapanMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_AsiaPacificRegionRiskincludingJapanMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_AsiaPacificRegionRiskincludingJapanMember" order="57" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_CollateralizedLoanObligationsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CollateralizedLoanObligationsRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CollateralizedLoanObligationsRiskMember" order="58" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_ExchangeTradedFundsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ExchangeTradedFundsRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ExchangeTradedFundsRiskMember" order="59" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_InvestmentCompaniesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_InvestmentCompaniesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_InvestmentCompaniesRiskMember" order="60" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_SeniorLoansAndOtherLoansRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_SeniorLoansAndOtherLoansRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_SeniorLoansAndOtherLoansRiskMember" order="61" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_EnvironmentalSocialAndGovernanceESGConsiderationsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_EnvironmentalSocialAndGovernanceESGConsiderationsRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_EnvironmentalSocialAndGovernanceESGConsiderationsRiskMember" order="62" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_ForeignGovernmentDebtRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ForeignGovernmentDebtRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ForeignGovernmentDebtRiskMember" order="63" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_CommodityLinkedNotesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CommodityLinkedNotesRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CommodityLinkedNotesRiskMember" order="64" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_ShortPositionRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ShortPositionRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ShortPositionRiskMember" order="65" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_ExchangeTradedNotesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ExchangeTradedNotesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ExchangeTradedNotesRiskMember" order="66" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_FactorBasedStrategyRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_FactorBasedStrategyRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_FactorBasedStrategyRiskMember" order="67" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_QuantitativeModelsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_QuantitativeModelsRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_QuantitativeModelsRiskMember" order="68" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_VolatilityRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_VolatilityRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_VolatilityRiskMember" order="69" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_Rule144ASecuritiesAndOtherExemptSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_Rule144ASecuritiesAndOtherExemptSecuritiesRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_Rule144ASecuritiesAndOtherExemptSecuritiesRiskMember" order="70" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_PrivateMarketsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_PrivateMarketsRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_PrivateMarketsRiskMember" order="71" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_RestrictedSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_RestrictedSecuritiesRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_RestrictedSecuritiesRiskMember" order="72" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_MunicipalSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_MunicipalSecuritiesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_MunicipalSecuritiesRiskMember" order="73" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_ZeroCouponOrPayInKindSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ZeroCouponOrPayInKindSecuritiesRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ZeroCouponOrPayInKindSecuritiesRiskMember" order="74" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_CommercialPaperRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_CommercialPaperRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_CommercialPaperRiskMember" order="75" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_WhenIssuedDelayedDeliveryAndForwardCommitmentRisksMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_WhenIssuedDelayedDeliveryAndForwardCommitmentRisksMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_WhenIssuedDelayedDeliveryAndForwardCommitmentRisksMember" order="76" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_TBATransactionsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_TBATransactionsRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_TBATransactionsRiskMember" order="77" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_DollarRollTransactionsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_DollarRollTransactionsRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_DollarRollTransactionsRiskMember" order="78" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_SubsidiaryRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_SubsidiaryRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_SubsidiaryRiskMember" order="79" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_RegulationSSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_RegulationSSecuritiesRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_RegulationSSecuritiesRiskMember" order="80" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_MoneyMarketFundRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_MoneyMarketFundRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_MoneyMarketFundRiskMember" order="81" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_USGovernmentObligationsRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_USGovernmentObligationsRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_USGovernmentObligationsRiskMember" order="82" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_MortgageAndAssetBackedSecuritiesRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_MortgageAndAssetBackedSecuritiesRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_MortgageAndAssetBackedSecuritiesRiskMember" order="83" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_HighYieldDebtSecuritiesJunkBondRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_HighYieldDebtSecuritiesJunkBondRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_HighYieldDebtSecuritiesJunkBondRiskMember" order="84" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_ValuationRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ValuationRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ValuationRiskMember" order="85" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_ManagementRiskMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_ManagementRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000896435_ManagementRiskMember" order="86" xbrldt:closed="true"/>    
  </definitionLink>     
  <definitionLink xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="extended">     
    <loc xlink:type="locator" xlink:label="oef_PerformanceMeasureDomain" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_PerformanceMeasureDomain"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_1000_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_1000_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_1000_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="11" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_SP_500_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="12" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_Midcap_Value_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_Midcap_Value_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_Midcap_Value_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="13" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Custom_Invesco_VI_BalancedRisk_Allocation_Index_60_MSCI_World_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxes_anMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Custom_Invesco_VI_BalancedRisk_Allocation_Index_60_MSCI_World_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxes_anMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Custom_Invesco_VI_BalancedRisk_Allocation_Index_60_MSCI_World_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxes_anMember" order="14" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_index_MSCI_ACWI_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_MSCI_ACWI_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_MSCI_ACWI_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="15" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_1000_Value_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_1000_Value_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_1000_Value_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="16" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_1000_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_1000_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_1000_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="17" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Bloomberg_US_Aggregate_Bond_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Bloomberg_US_Aggregate_Bond_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Bloomberg_US_Aggregate_Bond_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="18" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_Midcap_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_Midcap_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_Midcap_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="19" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_SP_500_Equal_Weight_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_SP_500_Equal_Weight_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_SP_500_Equal_Weight_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="20" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Bloomberg_US_GovernmentCredit_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Bloomberg_US_GovernmentCredit_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Bloomberg_US_GovernmentCredit_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="21" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_MSCI_ACWI_ex_USA_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_MSCI_ACWI_ex_USA_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_MSCI_ACWI_ex_USA_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="22" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_index_MSCI_ACWI_Growth_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_MSCI_ACWI_Growth_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_MSCI_ACWI_Growth_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="23" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Custom_Invesco_Global_Real_Estate_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Custom_Invesco_Global_Real_Estate_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Custom_Invesco_Global_Real_Estate_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="24" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_index_MSCI_World_IndexSM_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_MSCI_World_IndexSM_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_MSCI_World_IndexSM_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="25" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Bloomberg_Global_Aggregate_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Bloomberg_Global_Aggregate_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Bloomberg_Global_Aggregate_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="26" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_US_3_Month_Treasury_Bill_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_US_3_Month_Treasury_Bill_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_US_3_Month_Treasury_Bill_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="27" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Bloomberg_Intermediate_US_Government_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Bloomberg_Intermediate_US_Government_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Bloomberg_Intermediate_US_Government_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="28" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_SP_Composite_1500_Health_Care_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_SP_Composite_1500_Health_Care_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_SP_Composite_1500_Health_Care_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="29" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_MSCI_World_Health_Care_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_MSCI_World_Health_Care_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_MSCI_World_Health_Care_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="30" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Bloomberg_US_Corporate_High_Yield_2_Issuer_Cap_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Bloomberg_US_Corporate_High_Yield_2_Issuer_Cap_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Bloomberg_US_Corporate_High_Yield_2_Issuer_Cap_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="31" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000896435_index_MSCI_ACWI_ex_USA_Growth_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_MSCI_ACWI_ex_USA_Growth_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_MSCI_ACWI_ex_USA_Growth_Index_Net_reflects_reinvested_dividends_net_of_withholding_taxes_but_reflects_no_deduction_for_fees_expenses_or_other_taxesMember" order="32" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_Midcap_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_Midcap_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_Midcap_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="33" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000896435_index_Russell_2000_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_Russell_2000_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_Russell_2000_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="34" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000896435_index_SP_500_Index_Price_OnlyMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_SP_500_Index_Price_OnlyMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_SP_500_Index_Price_OnlyMember" order="35" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000896435_index_SP_North_American_Technology_Sector_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" xlink:href="ck0000896435-20260429.xsd#ck0000896435_index_SP_North_American_Technology_Sector_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember"/>  
<!-- [WMV6][balP9UJleXm2G1aXNUEFmTW2ztIw3IwU757tn7JV6FeVfEYzqYo3LQ7StK4XindMfusEFsAQrUXN230C7Xjia/K9FZFBp0ZVAZCw3olxI7M8WQVYBuQxBSvVXH5UoVAKmGzLZUPgBStagO3Z4uVJIPaBAWf4bYcjukZo3roxrSph2ll8es6PbGvgW1IWAluvX0FTJ+qyZj/Nj6KotpmZjkUXLSVTkGlycIp0KL2EBKQUODmY3xET41a1nGS4EvlHY3A0Za1p7K/vSxoLGFR7DqqwOa/Q+RwNyC3lg9roZUCeF8KyYs89HWHWL2itZo01z3XHKWF75KiJHivKtzt5FRreYBq89pTCuLKq9eJEK/Q7RqEUpOKZdQk/s4KreS4qyfbiUoMBuBdt3hzSnro3TvJEifNV0POME/WL5OYQvZYwTAtojE3HEw==] CSR--> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000896435_index_SP_North_American_Technology_Sector_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember" order="36" xbrldt:closed="true"/> 
  </definitionLink>     
</linkbase>
