Definition of rap verb from the Oxford Advanced American Dictionary

     

    rap

     verb
    verb
    NAmE//ræp//
     
    Verb Forms present simple I / you / we / they rap
     
    he / she / it raps
     
    past simple rapped
     
    -ing form rapping
     
     
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  1. 1[intransitive, transitive] to hit a hard object or surface several times quickly, making a noise (+ adv./prep.) She rapped angrily on the door. rap something (+ adv./prep.) He rapped the table with his pen.
  2. 2[transitive] rap something (out) + speech to say something suddenly and quickly in a loud, angry way He walked through the store, rapping out orders to his staff.
  3. 3[intransitive, transitive] rap (something) (music) to say the words of a rap see also rapper
  4. 4[transitive] rap somebody/something (for something/for doing something) (used mainly in newspapers) to criticize someone severely, usually publicly Some of the teachers were rapped for poor performance.
  5. Idioms
    rap somebody on/over the knuckles,rap somebody's knuckles
     
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    to criticize someone gently for something The company was rapped over the knuckles for broadcasting the interview.
See the Oxford Advanced Learner's Dictionary entry: rap