Main Entry: six·ty

Pronunciation: \ˈsiks-tē\

Function: noun

Inflected Form(s): plural sixties

Etymology: Middle English, from sixty, adjective, from Old English siextig, noun, group of sixty, from siex six + -tig group of ten; akin to Old English tīen ten

Date: 14th century

1 — see number table
2 plural : the numbers 60 to 69; specifically : the years 60 to 69 in a lifetime or century

— six·ti·eth \ˈsiks-tē-əth\ adjective or noun

— sixty adjective

— sixty pronoun, plural in construction

— six·ty·ish \ˈsiks-tē-ish\ adjective