vent - definition and synonyms

noun [countable] 

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  1. 1
    a hole or space that allows air, gas, or smoke to escape or fresh air to enter
    1. a.
      science a hole in the Earth’s surface through which lava or gas comes out
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  2. 2
    biology a small hole in the body of a fish or bird through which waste or eggs come out
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  3. 3
    a straight cut at the bottom of a jacket, dress etc that allows you to move more easily
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