from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a vertical (or near vertical) shaft that supplies ventilation to a tunnel or other underground facility
from the GNU version of the Collaborative International Dictionary of English
- A passage, usually vertical, for admitting fresh air into a mine or a tunnel.
from The Century Dictionary and Cyclopedia
- n. Same as air-pit.
- n. Any ventilating shaft.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a shaft for ventilation
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