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crack - definition and synonyms


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noun crack pronunciation in British English /kræk/
Word Forms
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  1. 1
    [countable] a line on a surface where something is beginning to break apart
    Many old buildings have cracks in their walls.
    hairline crack (=an extremely thin crack): Hairline cracks appear in the paint when it dries too quickly.
  2. 2
    [countable] a narrow opening between two things or parts of things
    She peered out through the crack in the curtains.
  3. 3
    [countable] a sign that an organization, relationship, or plan is weak or beginning to fail
    events which deepened the cracks in the monarchy
    cracks start to appear (in something): After only a year cracks started to appear in their marriage.
  4. 4
    [countable] a short sudden loud noise like a small explosion
    the sharp crack of a single gunshot
  5. 5
    [countable] informal a hard hit on a part of your body
    He’s had a nasty crack on the head.
  6. 6
    [countable] informal an attempt to do something
    have/take a crack at (doing) something: We thought we’d have a crack at running our own business.
  7. 7
    [countable] informal a rude or insulting joke about someone or something
    Some of the students were making cracks about her appearance.
    Synonyms and related words
  8. 8



    crack cocaine

    [uncountable] a pure form of the illegal drug cocaine
    crack addicts



a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

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an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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