Is the title of the officer who leads the devotions in Mohammedan mosques, and in Turkey conducts marriage and funeral services, as well as performs the ceremonies connected with circumcision; the office was filled and the title borne by Mahomet, hence it sometimes signifies head of the faith, and is so applied to the Sultan of Turkey; good Mohammedans believe in the future advent of an Imam—the hidden Imam—who shall be greater than the Prophet himself.