triad meaning and definition

TRIAD noun

Definition of triad (noun)

1. the cardinal number that is the sum of one and one and one
   • synonyms: 3, deuce-ace, III, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, trine, trinity, trio, triplet, troika
2. a set of three similar things considered as a unit
   • synonyms: trio, triple, triplet
3. three people considered as a unit
   • synonyms: threesome, trinity, trio
4. a three-note major or minor chord; a note and its third and fifth tones
   • synonyms: common chord