What is the meaning of Air hole?

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A fault in a casting, produced by a bubble of air; a blowhole.
A hole to admit or discharge air; specifically, a spot in the ice not frozen over.
A local region in the atmosphere having a downward movement and offering less than normal support for the sustaining surfaces of a flying machine.

Webster's Revised Unabridged Dictionary

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APA	Webster's. (2011). air hole. Retrieved September 28, 2026, from http://smartdefine.org/air_hole/definitions/1971976
Chicago	Webster's. 2011. "air hole" http://smartdefine.org/air_hole/definitions/1971976 (accessed September 28, 2026).
Harvard	Webster's 2011, air hole, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/air_hole/definitions/1971976>.
MLA	Webster's. "air hole" 27 May 2011. Web. 28 September 2026. <http://smartdefine.org/air_hole/definitions/1971976>

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