definition of
trio

[1] #1 trio n. [three, 3, III, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace] the cardinal number that is the sum of one and one and one. wn

[2] #2 trio n. a musical composition for three performers. wn

[3] #3 trio n. three performers or singers who perform together. wn

[4] #4 trio n. [triad, triplet, triple] a set of three similar things considered as a unit. wn

[5] #5 trio n. [threesome, triad, trinity] three people considered as a unit. wn