A group of three people or things. / A group of three musicians. / (music) A piece of music written for three musicians. / (music) A passage in the middle of a minuet, frequently in a different key.

plural of trio

a type of musical composition with two melodic parts and basso continuo

plural of trio sonata

plural of power trio

(music) A rock-and-roll band lineup consisting of electric guitar, bass guitar, and drum kit, omitting the rhythm guitar and keyboard instrument associated with larger lineups.