FLAP

flap. Flap, n. a blow, disease, thing pulled up or down

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Flap (?), n. [[OE. flappe, flap, blow, bly-flap; cf. D. flap, and E. flap, v.]] Anything broad and limber that hangs loose, or that is attached by one side or end and is easily moved; as, the flap of a garment. A cartilaginous flap upon the opening of the larynx. Sir T. Browne. 2. 2. A hinged leaf, as of a table or shutter.
3. 3. The motion of anything broad and loose, or a stroke or sound made with it; as, the flap of a sail or of a wing.
4. 4. pl. (Far.) A disease in the lips of horses.
Flap tile, a tile with a bent up portion, to turn a corner or catch a drip. — Flap valve (Mech.), a valve which opens and shuts upon one hinged side; a clack valve.