gauge - definition and synonyms

noun [countable] 

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  1. 1
    a piece of equipment that measures the amount of something

    the fuel/pressure gauge

    a rain/snow/hail gauge

  2. 2
    a way of saying how thick something is, especially something made of metal, wire, or plastic

    a small-gauge needle

    heavy-gauge plastic

     Synonyms and related words
    1. a.
      the distance between the two metal rails (=tracks) of a railway, or between the wheels of the train

      a narrow-gauge railway

    2. b.
      the width of the barrel of a gun (=the part you fire the bullet through)

      a 12-gauge shotgun

       Synonyms and related words
  3. 3
    [usually singular] a fact or event that can be used for judging someone or something

    New orders are a gauge of how well manufacturers are doing.