1 [C] a quick, sharp hit or knock on a door, window, etc （在门、窗等上的）急促敲打: There was a sharp rap on the door.有人在急促敲门。
2 [C,U] a style or a piece of music with a fast strong rhythm, in which the words are spoken fast, not sung 说唱乐（一种节奏强劲的乐曲，歌词不是唱出来而是念出来）
rap²
/ræp ||; ræp/verb (rapping;rapped)
1 [I,T] to hit a hard object or surface several times quickly and lightly, making a noise 急促地轻敲: She rapped angrily on/at the door.她气得直敲门。
2 [T] (informal 非正式) (used mainly in newspaper headlines) to criticize sb strongly （主要用于报纸标题）严厉批评，抨击: Minister raps police over rise in crime.罪案增加，大臣强烈批评警方。
3 [I] to speak the words of a song (a rap) that has music with a very fast strong rhythm （饶舌歌曲中以快节奏）念歌词