flap

any broad thin and limber covering attached at one edge; hangs loose or projects freely; "he wrote on the flap of the envelope"

an excited state of agitation; "he was in a dither"; "there was a terrible flap about the theft"

the motion made by flapping up and down

a movable piece of tissue partly connected to the body

a movable airfoil that is part of an aircraft wing; used to increase lift or drag

move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach"

move noisily; "flags flapped in the strong wind"

move with a thrashing motion; "The bird flapped its wings"; "The eagle beat its wings and soared high into the sky"

move with a flapping motion; "The bird's wings were flapping"

make a fuss; be agitated

pronounce with a flap, of alveolar sounds