From Longman Business Dictionarycertificate of depositcerˌtificate of deˈposit abbreviation CD (also deposit certificate) noun (plural certificates of deposit) [countable usually plural] FINANCEBANKINGa sum of money left with a bank for a particular period of time, and the document showing details of thisInterest from Certificates of Deposit can be deposited to your checking account.Philippine National Bank said it would issue $125 million worth of floating rate certificates of deposit with a maturity of three years. → eurodollar certificate of deposit → yankee dollar certificate of deposit