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cap - definition and synonyms

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noun [countable]     cap pronunciation in American English
Word Forms
  1. 1
    a soft hat with a stiff part called a bill or visor that comes out over your eyes

    a baseball cap

    1. a.
      a soft hat that people wear as part of a uniform

      a nurse’s/chauffeur’s/sailor’s cap

    2. b.
      a soft hat that you wear to protect or cover your hair

      a swimming/bathing/shower cap

  2. 2
    a lid or part that fits over the top of something

    Meg screwed the cap back on the bottle.

  3. 3
    literary the top part of a mountain

    the hills with their snowy caps

    1. a.
      the top part of a wave
    2. b.
      the round top part of a mushroom
      Synonyms and related words
  4. 5
    a hard cover attached to a tooth to protect it or replace part of it
    Synonyms and related words
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