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See also: Thrash




From Middle English thrasshen, a dialectal variant of thresshen, threshen (whence the modern English thresh), from Old English þrescan, from Proto-Germanic *þreskaną, whence also Old High German dreskan, Old Norse þreskja.



thrash (third-person singular simple present thrashes, present participle thrashing, simple past and past participle thrashed)

  1. To beat mercilessly.
  2. To defeat utterly.
    • 2011 January 8, Paul Fletcher, “Stevenage 3 - 1 Newcastle”, in BBC[1]:
      Pardew made five changes to the side that thrashed West Ham 5-0 on Wednesday - with players such as James Perch and Alan Smith given the chance to underline their case for a regular starting berth.
  3. To thresh.
  4. To move about wildly or violently; to flail; to labour.
  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.

Related termsEdit


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.


thrash (countable and uncountable, plural thrashes)

  1. (countable) A beat or blow; the sound of beating.
    • 1918, Henry Adams, The Education of Henry Adams:
      Even among friends at the dinner-table he talked as though he were denouncing them, or someone else, on a platform; he measured his phrases, built his sentences, cumulated his effects, and pounded his opponents, real or imagined. His humor was glow, like iron at dull heat; his blow was elementary, like the thrash of a whale.
    • 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.
    • 2016, Clark Nida, The Titan Kiss
      Spinning full-circle, the aircraft careered out of control. It bounced twice on the waves, each time managing to free itself from the engulfing spray with vigorous thrashes of its one good wing.
  2. (music, uncountable) A particularly aggressive and intense form of heavy metal music with a focus on speed, technical precision, and alternate picking.



  • (computing, software) P. J. Denning. 1968. Thrashing: Its Causes and Prevention. Proceedings AFIPS,1968 Fall Joint Computer Conference, vol. 33, pp. 915-922.