Trī'ad, n.
n. [Lat. trias, triadis, Gr. τριάς, τριάδος, from τρεῖς, τρία, three; Fr. & It. triade.]
- The union of three; three objects united.
- (Mus.) The common chord, consisting of a tone with its third and fifth, with or without the octave.
Triads of the Welsh bards, poetical histories, in which the facts recorded are grouped by threes, three things or circumstances of a kind being mentioned together.