What is the meaning of Air shaft?

A passage, usually vertical, for admitting fresh air into a mine or a tunnel.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). air shaft. Retrieved September 27, 2026, from http://smartdefine.org/air_shaft/definitions/1971985
ChicagoWebster's. 2011. "air shaft" http://smartdefine.org/air_shaft/definitions/1971985 (accessed September 27, 2026).
HarvardWebster's 2011, air shaft, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/air_shaft/definitions/1971985>.
MLAWebster's. "air shaft" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/air_shaft/definitions/1971985>
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