From Longman Dictionary of Contemporary EnglishRelated topics: Clothes & fashionbillfoldbill‧fold /ˈbɪlfəʊld $ -foʊld/ noun [countable]American EnglishDCMONEY a small flatleather case, used for carrying paper money, creditcards etc in your pocketSYN walletExamples from the Corpusbillfold• He checked the contents of his billfold and prayed over his gasgauge, that it stay above Emptyround-trip.