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thirty

Syllabification: (thir·ty)
Pronunciation: /ˈTHərtē/

Translate thirty | into French | into German | into Italian | into Spanish
Definition of thirty

number (plural thirties)

  • the number equivalent to the product of three and ten; ten less than forty; 30:thirty or forty years ago thirty were hurt thirty of her school friends (Roman numeral: xxx, XXX)
  • (thirties) the numbers from thirty to thirty-nine, especially the years of a century or of a person’s life:a woman in her thirties she was a famous actress in the thirties
  • thirty years old:I’ve got a long way to go before I’m thirty
  • thirty miles an hour:doing about thirty

Derivatives

thirtieth

Pronunciation: /-iTH/

number

thirtyfold

Pronunciation: /-ˌfōld/

adjective & adverb

Origin:

Old English thrītig (see three, -ty2). The spelling with initial thi- is recorded in the 15th century, and has been the prevalent form since the 16th century

thirty in other Oxford dictionaries

Definition of thirty in the British & World English dictionary