flap door

American  

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.

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Etymology

Origin of flap door

First recorded in 1835–45

Example Sentences

It was covered with a canopy, and Lawler sat beside a flap door.

From Seattle Times

Miyax peered out the flap door.

From Literature

Opening a flap door at the bottom of a lime-green bin the size of an industrial fridge, her gloved hands reach in to fish out the contents inside.

From The Guardian

Hikers and vacationers were in the woods, and more than once I pulled inside my tree, closed my deer- flap door, and hid while bouncing noisy people crossed the meadow on their way to the gorge.

From Literature

In front of each tier of 12 compartments is a flap door opening downward.

From Project Gutenberg