An ordinary (from Latin ordinarius) is an officer of a church or civic authority who by reason of office has ordinary power to execute laws.
Such officers are found in hierarchically organised churches of Western Christianity which have an ecclesiastical legal system. For example, diocesan bishops are ordinaries in the Catholic Church and the Church of England. In Eastern Christianity, a corresponding officer is called a hierarch (from Greek ἱεράρχης hierarkhēs "president of sacred rites, high-priest" which comes in turn from τὰ ἱερά ta hiera, "the sacred rites" and ἄρχω arkhō, "I rule").
