set

1. In music, this term generally has to do with the twelve-tone scale; it is a collection of twelve notes that cover each of the tones of the twelve-tone scale.

 

2. In popular music, a term used by musicians that refers to a portion of a live concert or dance. A standard set will often consist of 45 minutes of live music and a 15 minute break. Ensembles will often have a pre-determined list of songs that they will perform called a set list.