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.
That branch of theology which establishes the fact that God has made a supernatural revelation and established the Church, founded by Christ, as its divinely authorized custodian and interpreter. It is called theology because it is a science dealing with God; and it is fundamental because its role is to set forth the rational foundations of the Catholic faith. In some circles the term "fundamental theology" has taken on a derived and secondary meaning, namely the science of the fundamental doctrines of the Christian faith.