Thirty definition

thûrtē
Frequency:
The cardinal number equal to 3 × 10.
noun
5
1
This number used to signify the end of a dispatch, story, etc., as for a newspaper.
noun
4
1
An indication of the end of a news story, usually written 30.
noun
3
1
Three times ten.
adjective
3
1
A decade or the numbers from 30 to 39.

They settled down in their thirties. The temperature fell into the thirties.

noun
2
0
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The decade from 30 to 39 in a century.
noun
1
0
The cardinal number between twenty-nine and thirty-one; 30; XXX.
noun
1
0
(slang) A rack of thirty beers.
noun
1
0
(sports) The second point that is scored by one side in tennis.
noun
1
1
the thirties
  • the numbers or years, as of a century, from thirty through thirty-nine
idiom
1
0
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Other Word Forms

Noun

Singular:
thirty
Plural:
thirties

Idioms and Phrasal Verbs

the thirties

Origin of thirty

  • Middle English thritty, thirty from Old English thrītig trei- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English thirty, metathetic alternant of Middle English thritti, þrittiȝ, from Old English þritiÄ¡ (“thirty"), from Proto-Germanic *þrÄ«z tigiwiz (“thrity", literally “three tens"), equivalent to three +"Ž -ty. Cognate with Scots therty, tretty (“thirty"), West Frisian tritich (“thrity"), Dutch dertig (“thrity"), German dreißig (“thirty").

    From Wiktionary