The Collaborative International Dictionary
Rap \Rap\, n.
conversation; also, rapping.
(ca. 1985) a type of rhythmic talking, often with accompanying rhythm instruments; rap music.
rap music \rap` mu"sic\ (r[a^]p` m[=u]"z[i^]k), n. (ca. 1985) a type of rhythmic talking, often with accompanying rhythm instruments; same as 7th rap, n..
Wiktionary
n. A form of popular music emphasizing spoken rhymes over heavily rhythmic backing tracks.
WordNet
Usage examples of "rap music".
In stark contrast to this majesticsetting was the rap music blaring from the speakers.
The intermittent thud of rap music could be heard through the tinted windows.
With its glorification of murder and its celebration of cruelty to women, gangsta-rap music didn't start his toes tapping, either.
No need to explain to him the problem of rap music and young prisoners hollering from window to window all night, but, he repeats, the press interest is tying his hands.