What is the meaning of flapping?

noun

• The motion made by flapping up and down.
  • synonyms: flap, flutter, fluttering

verb

• Move in a wavy pattern or with a rising and falling motion.
  • usage: "The curtains undulated"; "the waves rolled towards the beach"
  • synonyms: roll, undulate, flap, wave
• Move noisily.
  • usage: "flags flapped in the strong wind"
  • synonyms: flap
• Move with a thrashing motion.
  • usage: "The bird flapped its wings"; "The eagle beat its wings and soared high into the sky"
  • synonyms: beat, flap
• Move with a flapping motion.
  • usage: "The bird's wings were flapping"
  • synonyms: beat, flap
• Make a fuss; be agitated.
  • synonyms: dither, flap, pother
• Pronounce with a flap, of alveolar sounds.
  • synonyms: flap