Compare French catholicisme.

• IPA^(key): /kəˈθɒlɪsɪzəm/

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Catholicism (usually uncountable, plural Catholicisms)

1. The faiths, practices and doctrines of the Catholic Church, usually the Roman Catholic Church.
   • 2011, Connie Green, Religious Diversity, Children's Literature, page 156:

     Catholicism is the second largest religious body after Sunni Muslims

• Roman Catholicism (synonymous in most contexts)

• Christianity, trinitarianism

• Mormonism, Protestantism, Quakerism