A cleric; someone (such as a priest) who administers a church (ecclesia) or other religious gathering/group.
A member of the Athenian ecclesia (public legislative assembly).
A member of any ecclesia (church or other assembly).
A Jew who is or is qualified to be the leader of a Jewish congregation.
A Jewish scholar or teacher of halacha (Jewish law), capable of making halachic decisions.
A senior officer who acts as a mentor.