Pronunciation : Tri"o
Part of Speech : n.
Etymology : [It., fr. L. tres, tria, three: cf. F. trio, from the Italian. See Three.]
Definition : 1. Three, considered collectively; three in company or acting together; a set of three; three united. The trio were well accustomed to act together, and were linked to each other by ties of mutual interest. Dickens.
2. (Mus.) (a) A composition for three parts or three instruments. (b) The secondary, or episodical, movement of a minuet or scherzo, as in a sonata or symphony, or of a march, or of various dance forms; -- not limited to three parts or instruments.
Source : Webster's Unabridged Dictionary, 1913