Main Entry:

thir·ty

Pronunciation:

\ˈthər-tē\

Function:

noun

Inflected Form(s):

plural thirties

Etymology:

Middle English thritty, from thritty, adjective, from Old English thrītig, from thrītig group of 30, from thrīe three + -tig group of ten; akin to Old English tīen ten

Date:

before 12th century

1 — see number table2plural : the numbers 30 to 39 ; specifically : the years 30 to 39 in a lifetime or century3: a sign of completion : end —usually written 30 <wrote thirty on the last page of the story>4: the second point scored by a side in a game of tennis

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

— thirty adjective

— thirty pronoun, plural in construction

— thir·ty·ish \-ish\ adjective