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flap door
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noun
Also called falling door. a door hinged at the bottom so as to fall downward and outward.
a door placed horizontally or on a shallow incline, as an exterior cellar door.
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Origin of flap door
First recorded in 1835–45
Words nearby flap door
flanning, flanny, flap, flap amputation, flapdoodle, flap door, flapdragon, flaperon, flapjack, flapless amputation, flap operation
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022