MASTER – 1)When speaking with a Bishop, you should say “Bless, Despota [Thés-po-ta]” (or “Vladika [Vlá-dee-ka]” in Slavonic, “Master” in English). It is also appropriate to say, “Bless, Your Grace” (or “Your Eminence,” etc.). You should end your conversation by asking for a blessing again. This is in respect to the bishop’s teaching ministry (ie, a school master).
2) (an appellation or Title of Jesus) “But be not ye called Rabbi: for one is your Master, even Christ; and all ye are brethren.” Matt 23:8