Definition of whisker noun from the Oxford Advanced Learner's Dictionary

     

    whisker

     noun
    noun
    BrE BrE//ˈwɪskə(r)//
     
    ; NAmE NAmE//ˈwɪskər//
     
    Parts of animals
     
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  1. 1[countable] any of the long stiff hairs that grow near the mouth of a cat, mouse, etc. See related entries: Parts of animals
  2. 2whiskers [plural] (old-fashioned or humorous) the hair growing on a man’s face, especially on his cheeks and chin
  3. Word Origin late Middle English (originally denoting a bundle of feathers, twigs, etc., used for whisking): from the verb whisk + -er.Idioms
    be the cat’s whiskers/pyjamas
     
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    (informal) to be the best thing, person, idea, etc. He thinks he's the cat's whiskers (= he has a high opinion of himself). See related entries: Happiness
    be, come, etc. within a whisker of something/doing something
     
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    to almost do something They came within a whisker of being killed.
    by a very small amount
See the Oxford Advanced American Dictionary entry: whisker