Flap | Webster's Dictionary (1865)

Flăp, n.

noun

n. [Cf. O. D. flabbe, a fly-flap, orig. any thing pendulous, Ger. flabbe, Sw. flabb, Dan. flab, a dropping or hanging mouth, allied to Lat. flaccus, flabby.] 1. Any thing broad and limber that hangs loose, or attached by one side or end and easily moved; as, the flap of a garment, of the ear, or of a hat. A cartilaginous flap on the opening of the larynx. Browne.

The motion of any thing broad and loose, or a stroke with it.
(pl.) (Far.) A disease in the lips of horses.

Flāp, v. t.

verbtransitive

v. t. [imp. & p. p. FLAPPED (flāpt); p. pr. & vb. n. FLAPPING.] 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 flap-like; as, to flap the wings; to let fall, as the brim of a hat. To flap in the mouth, to taunt. Carterright.

Flāp, v. i.

verbintransitive

v. i. 1. To move as wings, or as something broad or loose. 2. To fall and hang like a flap, as the brim of a hat, or other broad thing.