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  1. THIRTY Definition & Meaning | Dictionary.com

    THIRTY definition: a cardinal number, 10 times 3. See examples of thirty used in a sentence.

  2. Thirty - definition of thirty by The Free Dictionary

    1. the period of time between one's thirtieth and fortieth birthdays. 2. the range of temperatures between thirty and forty degrees.

  3. THIRTY | definition in the Cambridge English Dictionary

    SMART Vocabulary: related words and phrases (Definition of thirty from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

  4. thirty - Definition, pictures, pronunciation and usage notes ...

    Definition of thirty in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  5. thirty - Wiktionary, the free dictionary

    Dec 14, 2025 · thirty (plural thirties) (slang) A rack of thirty beers. […] instead of thirties [thirty-second commercials], they buy sixties, which cost twice as much. They spend more on filming …

  6. THIRTY - Definition & Translations | Collins English Dictionary

    Discover everything about the word "THIRTY" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.

  7. thirty - WordReference.com Dictionary of English

    thirties, the numbers, years, degrees, or the like, from 30 through 39, as in referring to numbered streets, indicating the years of a lifetime or of a century, or referring to degrees of temperature: …