triune denotes the essence or quality of 'being three in one' or 'being both three and one at the same time'. In simplest terms, a triune's a trichotomy. Other uses of the word may refer to: trinity refers to the Godhead in Christianity; see also Triple deities. triune brain theory proposed by Dr. Paul D. MacLean that evolution has given humans three distinct brains. triune immersion or trine immersion: the method of baptism practiced by the Church of the Brethren and other Anabaptist churches… (More on Triune)