- (n.) A nostril or spiracle in the top of the head of a whale or other cetacean.
- (n.) An air hole in a casting.
- (n.) A cavern in a cliff, at the water level, opening to the air at its farther extremity, so that the waters rush in with each surge and rise in a lofty jet from the extremity.
- (n.) A hole in the ice to which whales, seals, etc., come to breathe.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). blowhole. Retrieved September 23, 2026, from http://smartdefine.org/blowhole/definitions/1981125 |
| Chicago | Webster's. 2011. "blowhole" http://smartdefine.org/blowhole/definitions/1981125 (accessed September 23, 2026). |
| Harvard | Webster's 2011, blowhole, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/blowhole/definitions/1981125>. |
| MLA | Webster's. "blowhole" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/blowhole/definitions/1981125> |