An initially African-American form of aesthetic expression that developed in New York in the 1970s. The term originally named three closely related practices : graffiti, break dancing, and rap music. Today, the term is often used as a synonym for rap MCing and/or DJing.
(Source – Cox, C. and Warner, D. (2004) Audio Culture : Readings in Modern Music. Continuum.)
See also:DJ Culture, Turntablism