From Longman Dictionary of Contemporary Englishtwin bedˌtwin ˈbed noun [countable] 1 [usually plural]DHF one of a pair of single beds in a room for two people2 American EnglishDHF a bed that is just big enough for one person → double bed —twin-bedded adjective British English twin-bedded rooms
Examples from the Corpus
twin bed• Twenty heated minutes later he collapsed on to his twin bed, and turned on the telly. 