Definition of subprime adjective from the Oxford Advanced American Dictionary

 

subprime

 adjective
adjective
NAmE//ˌsʌbˈpraɪm//
 
(finance)
 
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connected with the practice of lending money, usually at a high rate of interest, to people who may not be able to pay the money back, because they have a bad credit rating subprime mortgages/loans/lending subprime lenders/borrowers The collapse of the U.S. subprime mortgage market has been blamed for the credit crunch.