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WordReference Random House Unabridged Dictionary of American English © 2024blow•hole (blō′hōl′),USA pronunciation n. - Miningan air or gas vent, esp. one to carry off fumes from a tunnel, underground passage, etc.
- Zoologyeither of two nostrils or spiracles, or a single one, at the top of the head in whales and other cetaceans, through which they breathe.
- Zoologya hole in the ice to which whales or seals come to breathe.
- Metallurgya defect in a casting or ingot caused by the escape of gas.
- Geologya hole in a sea cliff or coastal terrace through which columns of spray are jetted upward.
Collins Concise English Dictionary © HarperCollins Publishers:: blowhole /ˈbləʊˌhəʊl/ n - the nostril, paired or single, of whales, situated far back on the skull
- a hole in ice through which whales, seals, etc, breathe
- a vent for air or gas, esp to release fumes from a tunnel, passage, etc
- NZ a hole emitting gas or steam in a volcanic region
- a hole in a cliff top leading to a sea cave through which air is forced by the action of the sea
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