• (British) IPA: /θɹæʃ/

thrash (thrashes, present participle thrashing; past and past participle thrashed)

  1. To beat mercilessly.
  2. To defeat utterly.
  3. To thresh.
  4. To move about wildly or violently; to flail; to labour.
    • circa 1690 Juvenal, John Dryden (translator), The Tenth Satire of Juvenal, 1987, John Dryden: The Major Works, Oxford University Press, page 364 ↗,
      I rather would be Maevius, thrash for rhymes, / Like his, the scorn and scandal of the times.
  5. (software) To extensively test a software system, giving a program various inputs and observing the behavior and outputs that result.
  6. (computing) In computer architecture, to cause poor performance of a virtual memory (or paging) system.
Translations Translations Translations
  • Russian: молоти́ть


  1. (countable) A beat or blow; the sound of beating.
    • 1934 May, Robert E. Howard, Queen of the Black Coast in Weird Tales,
      As he reeled on wide-braced legs, sobbing for breath, the jungle and the moon swimming bloodily to his sight, the thrash of bat-wings was loud in his ears.
  2. (music, uncountable) A particularly aggressive and intense form of heavy metal music with a focus on speed, technical precision, and alternate picking.
Proper noun
  1. Surname

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