Christian church, church - one of the groups of Christians who have their own beliefs and forms of worship

Church of Rome, Roman Catholic Church, Roman Church, Western Church, Roman Catholic - the Christian Church based in the Vatican and presided over by a pope and an episcopal hierarchy

Old Catholic Church - Catholic churches that broke away from the Roman Catholic Church in the 18th century

Byzantine Church, Eastern Church - the Catholic Church as it existed in the Byzantine Empire

Eastern Church, Eastern Orthodox, Eastern Orthodox Church, Orthodox Catholic Church, Orthodox Church - derived from the Byzantine Church and adhering to Byzantine rites

Uniat Church, Uniate Church - any of several churches in eastern Europe or the Middle East that acknowledge papal authority but retain their own liturgy

Catholic - a member of a Catholic church