| Triad 1. (n.) A union of three persons or things; three objects treated as one; a ternary; a trinity; as, a triad of deities. 2. (n.) A chord of three notes. 3. (n.) The common chord, consisting of a tone with its third and fifth, with or without the octave. 4. (n.) An element or radical whose valence is three. Thesaurus Entries arpeggio, broken chord, chord, clover, common chord, concento, concord, consonant chord, deuce-ace, diminished seventh chord, dominant chord, enharmonic, leash, major triad, minor chord, set of three, seventh chord, shamrock, sixth chord, tercet, ternary, ternion, terzetto, three, threesome, tierce, tonic triad, trefoil, trey, trialogue, triangle, tricorn, trident, triennium, trihedron, trilogy, trimester, trine, trinity, trinomial, trio, triphthong, triple, triple crown, triple threat, triplet, triplopy, tripod, triptych, trireme, triseme, triskelion, trisul, triumvirate, triune, triunity, trivet, troika, unbroken chord |