Main Entry: twen·ty

Pronunciation: \ˈtwen-tē, ˈtwən-\

Function: noun

Inflected Form(s): plural twenties

Etymology: Middle English, from twenty, adjective, from Old English twēntig, noun, group of 20, from twēn- (akin to Old English twā two) + -tig group of 10; akin to Old English tīen ten — more at two, ten

Date: 13th century

1 — see number table
2 plural : the numbers 20 to 29; specifically : the years 20 to 29 in a lifetime or century
3 : a 20-dollar bill

— twen·ti·eth \-tē-əth\ adjective or noun

— twenty adjective

— twenty pronoun, plural in construction