n.
Pronunciation: ' th ə r-t ē
Function: noun
Inflected Form: plural thirties
Etymology: Middle English thritty, from thritty, adjective, from Old English thr ī tig, from thr ī tig group of 30, from thr ī e three + -tig group of ten; akin to Old English t ī en ten
Date: before 12th century
1 ― see NUMBER table
2 plural : the numbers 30 to 39 specifically : the years 30 to 39 in a lifetime or century
3 : 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 \ -t ē - ə th \ adjective or noun
– thirty adjective
– thirty pronoun, plural in construction
– thir · ty · ish \ -ish \ adjective