Definitions
1.NounA grouping of three.
2.NounA romantic or sexual relationship between three individuals; a throuple.
3.NounA word of three syllables.
4.NounA branch of a Chinese underground criminal society, mostly based in Hong Kong.
5.NounOn a CRT display, a group of three neighbouring phosphor dots, coloured green, red, and blue.
6.NounA chord consisting of a root tone, the tone two degrees higher, and the tone four degrees higher in a given scale OR any chord with three notes.