collateral collateral /kəˈlætɝəl/

adjective

1. Occurring with or following as a consequence  ( accompanying , attendant , collateral , concomitant , consequent , ensuant , incidental , resultant , sequent )
   occurring with or following as a consequence
    An excessive growth of bureaucracy, with attendant problems
   an excessive growth of bureaucracy, with attendant problems
    Snags incidental to the changeover in management
   snags incidental to the changeover in management
    Attendant circumstances
   attendant circumstances
    The period of tension and consequent need for military preparedness
   the period of tension and consequent need for military preparedness
    The ensuant response to his appeal
   the ensuant response to his appeal
    The resultant savings were considerable
   the resultant savings were considerable
    Collateral target damage from a bombing run
   collateral target damage from a bombing run
   
2. Descended from a common ancestor but through different lines  ( collateral , indirect )
   descended from a common ancestor but through different lines
    Cousins are collateral relatives
   cousins are collateral relatives
    An indirect descendant of the Stuarts
   an indirect descendant of the Stuarts
   
3. Situated or running side by side  ( collateral )
   situated or running side by side
    Collateral ridges of mountains
   collateral ridges of mountains
   
4. Additional but secondary; auxiliary  ( collateral )
   additional but secondary; auxiliary
   
5. Serving to support or corroborate  ( collateral , confirmative , confirmatory , confirming , corroborative , corroboratory , substantiating , substantiative , validating , validatory , verificatory , verifying )
   serving to support or corroborate
    Collateral evidence
   collateral evidence
   

noun

1. A security pledged for the repayment of a loan  ( collateral )
   a security pledged for the repayment of a loan