(often Triad) any of various Chinese secret societies, esp one engaged in organized crime, such as drug trafficking, extortion, and prostitution
a union or group of three related or associated people or things
in music, a chord made up of a given note plus the two notes a third and fifth above it
a form of Welsh literary composition in which the subjects or statements are arranged in groups of three
(often Triad)
any of various Chinese secret societies, esp one engaged in organized crime, such as drug trafficking, extortion, and prostitution
a member of such a society
triadic /trieʹadik/ adj
triadism noun
[probably from French triade, via Latin from Greek triad-, trias, from treis three]