Webster's Revised Unabridged Dictionary · 1913

Rabbi

Rabbi (rar"bī or rar"bi; 277) , noun

[Latin, from Greek "rabbi`, Hebrew rabī my master, from rab master, lord, teacher, akin to Arabic rabb.]

Master; lord; teacher; -- a Jewish title of respect or honor for a teacher or doctor of the law.
The gravest rabbies. — Milton
Be not ye called Rabbi, for one is your Master, even Christ, and all ye are brethren. — Matt. xxiii. 8