"flap" in the noun sense

1. flap

any broad thin and limber covering attached at one edge hangs loose or projects freely

"he wrote on the flap of the envelope"

2. dither, pother, fuss, tizzy, flap

an excited state of agitation

"he was in a dither"

"there was a terrible flap about the theft"

3. flap, flapping, flutter, fluttering

the motion made by flapping up and down

4. flap

a movable piece of tissue partly connected to the body

5. flap, flaps

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

"flap" in the verb sense

1. roll, undulate, flap, wave

move in a wavy pattern or with a rising and falling motion

"The curtains undulated"

"the waves rolled towards the beach"

2. flap

move noisily

"flags flapped in the strong wind"

3. beat, flap

move with a thrashing motion

"The bird flapped its wings"

"The eagle beat its wings and soared high into the sky"

4. beat, flap

move with a flapping motion

"The bird's wings were flapping"

5. dither, flap, pother

make a fuss be agitated

6. flap

pronounce with a flap, of alveolar sounds

Source: WordNet® (An amazing lexical database of English)

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