Today's Word of the Day means...
A form of pop music characterized by spoken or chanted rhymed lyrics, with a syncopated, repetitive accompaniment. Rap music originated in the second half of the twentieth century in black urban communities. (See also hip-hop.)
[origin unknown; perhaps related to repartee, perhaps to rapport, perhaps to rapid]
["An Interpreter for a Language for Describing Assemblies", R.J. Popplestone et al, Artif Intell 14:79-107 (1980)].