Catholic Dictionary

Find accurate definitions of over 5,000 Catholic terms and phrases (including abbreviations). Based on Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.

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UNDERGROUND CHURCH

A group of persons, generally professed Catholics, who function outside the established church structure. But the term is mainly applied to those who live in places where Catholics, or Christians generally, are persecuted for their profession and sharing of the faith.