CatholicismCatholicism has two main ecclesiastical meanings, described in Webster's Dictionary as: a) "the whole orthodox Christian church, or adherence thereto"; and b) "the doctrines or faith of the Roman Catholic church, or adherence thereto."
The term Catholicism, derived from the Greek adjective καθολικός (katholikos), meaning "general" or "universal", is widely understood to refer to the Church, governed by the Bishop of Rome and the bishops in communion with him. However, other Churches that trace their historic episcopate to the apostolic succession — such as the Oriental Orthodox Churches, the Eastern Orthodox Churches, the Assyrian Church of the East, the Churches of the Anglican Communion, and the Old-Catholics — consider themselves to be branches of the Catholic Church. Neo-Lutheranism argues that Lutheran Churches are simply a Protestant reform movement that remains within the greater Church catholic.
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