<?xml version="1.0" encoding="US-ASCII"?>  
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->    
<!-- Created: Mon Dec 16 18:09:29 UTC 2024 -->  
<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/2024/oef-2024.xsd#ProspectusOnly" roleURI="http://xbrl.sec.gov/rr/role/ProspectusOnly"/>  
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2024/oef-2024.xsd#SeriesOnly" roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly"/>     
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2024/oef-2024.xsd#ClassOnly" roleURI="http://xbrl.sec.gov/oef/role/ClassOnly"/>   
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2024/oef-2024.xsd#RiskOnly" roleURI="http://xbrl.sec.gov/rr/role/RiskOnly"/>     
  <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/2024/dei-2024.xsd#dei_DocumentDomain"/>     
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_Portfolio_Investor_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_Portfolio_Investor_ClassMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_Portfolio_Investor_ClassMember" order="11" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_US_Government_Money_Portfolio_Investor_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_US_Government_Money_Portfolio_Investor_ClassMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_US_Government_Money_Portfolio_Investor_ClassMember" order="12" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_Portfolio_Institutional_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_Portfolio_Institutional_ClassMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_Portfolio_Institutional_ClassMember" order="13" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_US_Government_Money_Portfolio_Institutional_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_US_Government_Money_Portfolio_Institutional_ClassMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_US_Government_Money_Portfolio_Institutional_ClassMember" order="14" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_Portfolio_Personal_Investment_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_Portfolio_Personal_Investment_ClassMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_Portfolio_Personal_Investment_ClassMember" order="15" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_Portfolio_Private_Investment_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_Portfolio_Private_Investment_ClassMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_Portfolio_Private_Investment_ClassMember" order="16" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_Portfolio_Reserve_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_Portfolio_Reserve_ClassMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_Portfolio_Reserve_ClassMember" order="17" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_doc_Invesco_Premier_Portfolio_Resource_ClassMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_doc_Invesco_Premier_Portfolio_Resource_ClassMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentDomain" xlink:to="ck0000828806_doc_Invesco_Premier_Portfolio_Resource_ClassMember" order="18" 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/2024/dei-2024.xsd#dei_EntityDomain"/> 
    <loc xlink:type="locator" xlink:label="ck0000828806_S000000173Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_S000000173Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000828806_S000000173Member" order="11" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_S000000176Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_S000000176Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000828806_S000000176Member" order="12" 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/2024/oef-2024.xsd#oef_ShareClassDomain"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_C000000397Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000000397Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000000397Member" order="11" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000000400Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000000400Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000000400Member" order="12" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000029748Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000029748Member"/>     
<!-- [WMV6][XcpuxYn59dz7vgYynUDuwG7r97K2jUTysl7vcz0lJt+RMWF/8mwKgXndJJ1SJyvmgKvxuLfGxyYwOGgwR4iCxhnvainhLaXB34R7HXn8OgkWcEjbd9cL8U+QVig20Q8F2Py+367abx7ppPE6tSsqTZa31SnlfdcfjvP9kZqYMD5M9jNtrOrKhb94Sm0lgnTjdIk27+ALnsWsRRaiKPhZ8atbREbf/Y2yCnEBzzrVydQsEoHA2XHo8YO4FGRz3rdaeR4FuwfZMw+DRVLL5ucfvpPLwr5pTd8G5uelz+1CQQwT1tp0KkGB/w==] CSR-->   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000029748Member" order="13" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000029750Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000029750Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000029750Member" order="14" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000173345Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000173345Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000173345Member" order="15" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000173346Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000173346Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000173346Member" order="16" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000173347Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000173347Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000173347Member" order="17" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_C000173348Member" xlink:href="ck0000828806-20240831.xsd#ck0000828806_C000173348Member"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000828806_C000173348Member" order="18" 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/2024/oef-2024.xsd#oef_AllRisksMember"/>     
    <loc xlink:type="locator" xlink:label="ck0000828806_MoneyMarketFundRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_MoneyMarketFundRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_MoneyMarketFundRiskMember" order="11" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_DebtSecuritiesRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_DebtSecuritiesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_DebtSecuritiesRiskMember" order="12" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_ChangingFixedIncomeMarketConditionsRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_ChangingFixedIncomeMarketConditionsRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_ChangingFixedIncomeMarketConditionsRiskMember" order="13" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_MarketRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_MarketRiskMember"/>     
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_MarketRiskMember" order="14" xbrldt:closed="true"/>     
    <loc xlink:type="locator" xlink:label="ck0000828806_BankingAndFinancialServicesIndustryFocusRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_BankingAndFinancialServicesIndustryFocusRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_BankingAndFinancialServicesIndustryFocusRiskMember" order="15" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_ForeignSecuritiesAndCreditExposureRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_ForeignSecuritiesAndCreditExposureRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_ForeignSecuritiesAndCreditExposureRiskMember" order="16" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_RestrictedSecuritiesRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_RestrictedSecuritiesRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_RestrictedSecuritiesRiskMember" order="17" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_Rule144ASecuritiesAndOtherExemptSecuritiesRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_Rule144ASecuritiesAndOtherExemptSecuritiesRiskMember"/>  
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_Rule144ASecuritiesAndOtherExemptSecuritiesRiskMember" order="18" xbrldt:closed="true"/> 
    <loc xlink:type="locator" xlink:label="ck0000828806_RepurchaseAgreementRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_RepurchaseAgreementRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_RepurchaseAgreementRiskMember" order="19" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_USGovernmentObligationsRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_USGovernmentObligationsRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_USGovernmentObligationsRiskMember" order="20" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_MunicipalSecuritiesRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_MunicipalSecuritiesRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_MunicipalSecuritiesRiskMember" order="21" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_YieldRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_YieldRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_YieldRiskMember" order="22" xbrldt:closed="true"/>    
    <loc xlink:type="locator" xlink:label="ck0000828806_VariableRateDemandNotesRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_VariableRateDemandNotesRiskMember"/>    
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_VariableRateDemandNotesRiskMember" order="23" xbrldt:closed="true"/>  
    <loc xlink:type="locator" xlink:label="ck0000828806_EnvironmentalSocialAndGovernanceESGConsiderationsRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_EnvironmentalSocialAndGovernanceESGConsiderationsRiskMember"/> 
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_EnvironmentalSocialAndGovernanceESGConsiderationsRiskMember" order="24" xbrldt:closed="true"/>   
    <loc xlink:type="locator" xlink:label="ck0000828806_ManagementRiskMember" xlink:href="ck0000828806-20240831.xsd#ck0000828806_ManagementRiskMember"/>   
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000828806_ManagementRiskMember" order="25" xbrldt:closed="true"/>    
  </definitionLink>     
</linkbase>
