Noun

• S: (n) flap (flap%1:11:01::), flapping (flapping%1:11:00::), flutter (flutter%1:11:01::), fluttering (fluttering%1:11:00::) (the motion made by flapping up and down)

Verb

• S: (v) roll (roll%2:38:10::), undulate (undulate%2:38:00::), flap (flap%2:38:01::), wave (wave%2:38:00::) (move in a wavy pattern or with a rising and falling motion) "The curtains undulated"; "the waves rolled towards the beach"
• S: (v) flap (flap%2:38:00::) (move noisily) "flags flapped in the strong wind"
• S: (v) beat (beat%2:38:04::), flap (flap%2:38:03::) (move with a thrashing motion) "The bird flapped its wings"; "The eagle beat its wings and soared high into the sky"
• S: (v) beat (beat%2:38:02::), flap (flap%2:38:02::) (move with a flapping motion) "The bird's wings were flapping"
• S: (v) dither (dither%2:37:00::), flap (flap%2:37:00::), pother (pother%2:37:00::) (make a fuss; be agitated)
• direct hypernym / inherited hypernym / sister term
• derivationally related form
• sentence frame
• S: (v) flap (flap%2:32:00::) (pronounce with a flap, of alveolar sounds)