■ noun ( plural ~s )
1》 a set or group of three.
↘(in piquet) a set of three aces, kings, queens, jacks, or tens held in one hand.
2》 a group of three musicians.
↘a composition written for three musicians.
↘the central section of a minuet, scherzo, or march.
Origin
C18: from Ital., from L. tres 'three'.