n. In music: A concert.n. Same as concertante.n. A composition for two or more solo instruments of the same or of a different kind: as, Bach's concerto for four pianos; Handel's concerti grossi for two violins and violoncello soli, with accompaniment for a stringed orchestra. Such concertos are called double, triple, etc., according to the number of solo instruments.n. A composition, usually in symphonic form, written for one principal instrument (occasionally for more than one), with accompaniment for a large or small orchestra, and intended to display the ability of a solo performer.