Definition of flap verb from the Oxford Advanced American Dictionary

     

    flap

     verb
    verb
    NAmE//flæp//
     
    Verb Forms present simple I / you / we / they flap
     
    he / she / it flaps
     
    past simple flapped
     
    -ing form flapping
     
     
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    move quickly
  1. 1[transitive, intransitive] flap (something) if a bird flaps its wings, or if its wings flap, they move quickly up and down synonym beat The bird flapped its wings and flew away. The gulls flew off, wings flapping.
  2. 2[intransitive, transitive] to move, or to make something move, up and down or from side to side, often making a noise (+ adv./prep.) The sails flapped in the breeze. Two large birds flapped (= flew) slowly across the water. flap something She walked up and down, flapping her arms to keep warm. A gust of wind flapped the tents.
  3. phonetics
  4. 3 [transitive] flap something = tap
See the Oxford Advanced Learner's Dictionary entry: flap

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