Easton's Bible Dictionary: M. G. Easton, M.A., D.D.

Advocate

(Gr.parakletos), one who pleads another's cause, who helps another by defending or comforting him. It is a name given by Christ three times to the Holy Ghost (Jn. 14:16, 15:26, 16:7, where the Greek word is rendered "Comforter," q.v.). It is applied to Christ in 1 Jn. 2:1, where the same Greek word is rendered "Advocate," the rendering which it should have in all the places where it occurs. Tertullus "the orator" (Acts 24:1) was a Roman advocate whom the Jews employed to accuse Paul before Felix.