Belief in a triple god, as currently in Christianity, with the Trinity. Contrasts with monotheism, and formed in a similar way. Example: Triotheism was established in Christianity by the Council of Nicea, which declared that Jesus was a god, and later by the development of the doctrine of the Trinity.
TRIOTHEISM
Meaning of TRIOTHEISM in English
Slang English vocab. Английский сленговый словарь. 2012