noun (plural sixties) Etymology: Middle English, from ~, adjective, from Old English siextig, noun, group of ~, from siex six + -tig group of ten; akin to Old English tīen ten Date: 14th century see: number the numbers 60 to 69, sixtieth adjective or noun ~ adjective ~ pronoun, plural in construction ~ish adjective
SIXTY
Meaning of SIXTY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012