from
The Collaborative International Dictionary of English v.0.48
disc jockey \disc" jock`ey\ (d[i^]sk" j[o^]k`[y^]), n.
a person who plays records or compact disks of recorded
music; especially, a person who selects and plays recorded
music for broadcast over the radio, often making comments
about the music or other topics and also announcing
commercial advertising messages; also, one who plays recorded
music at a dance or social gathering, especially as a
profession. [Also spelled {disk jockey}.]
Syn: DJ. [PJC]