1) a teacher
 2) in the NT one who teaches concerning the things of God, and the
    duties of man
    1a) one who is fitted to teach, or thinks himself so
    1b) the teachers of the Jewish religion
    1c) of those who by their great power as teachers draw crowds
        around them i.e. John the Baptist, Jesus
    1d) by preeminence used of Jesus by himself, as one who showed
        men the way of salvation
    1e) of the apostles, and of Paul
    1f) of those who in the religious assemblies of the Christians,
        undertook the work of teaching, with the special assistance of
        the Holy Spirit
    1g) of false teachers among Christians