Definitions for: Flap

[n] any broad thin and limber covering attached at one edge; hangs loose or projects freely; "he wrote on the flap of the envelope"
[n] a movable airfoil that is part of an aircraft wing; used to increase lift or drag
[n] a movable piece of tissue partly connected to the body
[n] the motion made by flapping up and down
[n] an excited state of agitation; "he was in a dither"; "there was a terrible flap about the theft"
[v] pronounce with a flap, of alveolar sounds
[v] make a fuss; be agitated
[v] move noisily; "flags flapped in the strong wind"
[v] move in a wavy pattern, as of curtains
[v] move with a flapping motion; "The bird's wings were flapping"
[v] move with a thrashing motion; "The bird flapped its wings"; "The eagle beat its wings and soared high into the sky"

Webster (1913) Definition: 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.

2. A hinged leaf, as of a table or shutter.

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. 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.

Flap, v. t. [imp. & p. p. Flapped; p. pr. & vb. n.
Flapping.] [Prob. of imitative origin; cf. D. flappen, E.
flap, n., flop, flippant, fillip.]
1. To beat with a flap; to strike.

Yet let me flap this bug with gilded wings. --Pope.

2. To move, as something broad and flaplike; as, to flap the
wings; to let fall, as the brim of a hat.

To flap in the mouth, to taunt. [Obs.] --W. Cartwright.

Flap, v. i.
1. To move as do wings, or as something broad or loose; to
fly with wings beating the air.

The crows flapped over by twos and threes. --Lowell.

2. To fall and hang like a flap, as the brim of a hat, or
other broad thing. --Gay.

Synonyms: dither, dither, flapping, flaps, flutter, fluttering, fuss, pother, pother, tizzy, undulate, wave

See Also: aerofoil, agitation, airfoil, animal tissue, articulate, barndoor, bate, beat, clap, coattail, codpiece, control surface, covering, cusp, dag, displace, earflap, earlap, enounce, enunciate, flail, fly, fly sheet, fret, fuss, jag, landing flap, lap, leaflet, luff, move, niggle, overlap, pocket flap, pound, pronounce, protective fold, say, soft palate, sound out, surface, tent flap, tent-fly, thresh, thump, tongue, undulation, uvula, velum, wave, wing

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