From Longman Dictionary of Contemporary Englishsixtysix‧ty /ˈsɪksti/ ●●● W3 number 1 HMNthe number 60 sixty years ago2 → the sixties3 → be in your sixties4 → in the sixties —sixtieth adjective, pronoun her sixtieth birthdayOrigin sixty Old English sixtig, from six “six”
