Another version of a song. Depending on the type of remix, it can sound almost the same or completely different. Sometimes remixes are created to make a short song longer, or to shorten a long song for the radio, or because people get tired of listening to one version of a song and it's cheaper to simply remix it than to come up with a new song.

Remixes are most common with dance music, since it lends itself to remixing well. Change the beat and add some new sound effects and WHAM.. you got a new song. In some cases remixes are better than the original.... But more often than not, they blow chunks.