Short for tri-unity, or three in one, and refers to the revelation of God peculiar to Christianity, (being never clearly revealed till Christ carne), of Father, Son, and Holy Ghost. Looked at generally, it may be said that it is God the Father who wills, the Son who carries out the will by the agency of the Spirit; but all are one God, though thus known not only in three characters, but in three persons. The Son alone has a body, God the Father, and the Holy Ghost are spirit.