Rabbi

"My master, a title of dignity given by the Jews to their doctors" of the law and their distinguished teachers. It is sometimes "applied to Christ (Matt. 23:7, 8; Mark 9:5 (R.V.); John 1:38," "49; 3:2; 6:25, etc.); also to John (3:26)."

Definition of Rabbi:
"Rabboni, my master"