"flaps" in the noun sense
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
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
"flaps" 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"
"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
pronounce with a flap, of alveolar sounds
Source: WordNet® (An amazing lexical database of English)
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