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flap door

 - 1 dictionary result

flap door

–noun
1. Also called falling door. a door hinged at the bottom so as to fall downward and outward.
2. a door placed horizontally or on a shallow incline, as an exterior cellar door.

Origin:
1835–45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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