sixty

six·ty

noun \ˈsiks-tē\

plural sixties

Definition of SIXTY

1

: a number that is equal to six times 10 — 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

Examples of SIXTY

1. He retired when he was in his sixties.

Origin of SIXTY

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

First Known Use: 14th century