Rap n. : A lay or skein containing 120 yards of yarn.

Rap v. i. : To strike with a quick, sharp blow; to knock; as, to rap on the door.

Rap v. t. : To strike with a quick blow; to knock on.

Rap v. t. : To free (a pattern) in a mold by light blows on the pattern, so as to facilitate its removal.

Rap n. : A quick, smart blow; a knock.

Rap v. : To snatch away; to seize and hurry off.

Rap v. : To hasten.

Rap v. : To seize and bear away, as the mind or thoughts; to transport out of one's self; to affect with ecstasy or rapture; as, rapt into admiration.

Rap v. : To exchange; to truck.

Rap n. : A popular name for any of the tokens that passed current for a half-penny in Ireland in the early part of the eighteenth century; any coin of trifling value.

Example:
Whats the difference between Rap and hip hop?

Taxonomy
rappers, rap, hip hop, MCs, Kool Moe Dee, Thunder's Mouth Press, On The Mic, God, Cambridge University Press, Rap Music And The Poetics Of Identity, Adam Krims, rhymes, hip hop music, rap lyrics, Emceeing, History, song, cadence.

Defination from the web:
rap occupies a gray area among speech, prose, poetry, and song. ... Herc, a Jamaican immigrant, started delivering simple raps at his parties, inspired by the Jamaican tradition of toasting.[13] Old school rap ...