Pronunciation Noun


  1. A frizzy mass of hair or fibre.
    • 1895, Hamlin Garland, Rose of Dutcher's Coolly, page 352:
      His cheeks were like peaches, with much the same sort of fuzz over them.
  2. Quality of an image that is unclear; a blurred image.
  3. (computing) The random data used in fuzz testing.
  4. A distorted sound, especially from an electric guitar or other amplified instrument.
  5. A state of befuddlement.
    • 1784, Jonathan Swift, "Journal to Stella", The works of the Rev. Dr. Jonathan Swift, page 54:
      I think I'm in a fuzz, and don't know what I ſay, I never ſaw the like.
  • French: duvet
  • Russian: пух

fuzz (fuzzes, present participle fuzzing; past and past participle fuzzed)

  1. (transitive) To make fuzzy.
  2. (intransitive) To become fuzzy.
  3. (transitive, dated) To make drunk.
  4. (computing) To test a software component by running it on randomly generated input.
    • 2012, Charlie Miller, ‎Dion Blazakis, ‎Dino DaiZovi, iOS Hacker's Handbook (page 172)
      Sulley works by fuzzing the first fuzzable field to be fuzzed. While it is iterating through all the values it wants to try for that field, all the other fields are untouched and remain at their default value.
  5. (intransitive, dated) To fly off in minute particles with a fizzing sound, like water from hot metal.

fuzz (uncountable)

  1. (US, slang, with "the") The police.
    • 2009, The Imaginarium of Doctor Parnassus, 0:26:17:
      Let's get the hell out of here before the fuzz turns up
  • Russian: мент
  • Spanish: pasma

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