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Definition blowhole in British English

blowhole noun

[countable] noun
/ˈbləʊˌhəʊl/
1

a hole in the top of the head of a sea animal such as a whale or dolphin, through which it breathes

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2

a hole in the surface of ice that sea animals such as whales and seals use to breathe through

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3

a hole in a tunnel through which gases can escape

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Definition blowhole in British English