Meaning of TRIAD in English

TRIAD

/ ˈtraɪæd; NAmE / noun

1.

( formal ) a group of three related people or things

2.

(also Triad ) a Chinese secret organization involved in criminal activity

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WORD ORIGIN

mid 16th cent.: from French triade , or via late Latin from Greek trias , triad- , from treis three. Sense 2 is a translation of Chinese San Ho Hui , literally three unite society, i.e. triple union society , said to mean the union of Heaven, Earth, and Man .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.