Concise Bible Dictionary
A word only used to convey the thought of a plurality of Persons in the Godhead.
This was revealed at the baptism of the Lord Jesus. The Holy Spirit descended “like a dove” and abode upon Him; and God the Father declared “This is My beloved Son in whom I am well pleased.” That the Father is a distinct Person and is God is plainly stated, as in John 20:17.
Many passages prove that the Lord Jesus is God: one will suffice: “in His Son Jesus Christ. This is the true God, and eternal life” (1 John 5:20).
That the Holy Spirit is a Person and is God the following passages clearly prove (Gen. 1:2; Matt. 4:1; John 16:13; Acts 10:19; Acts 13:2,4; Acts 20:28; Rom. 15:30; 1 Cor. 2:10).
The three Persons are also named in the formula instituted by Christ in baptism (Matt. 28:19). Yet there is but one God (1 Tim. 2:5).
Satan will have an imitation of the Trinity in the Roman beast, the false prophet, and himself (Rev. 13:4,11; Rev. 20:10).