Pronunciation: (fun"du-men'tl-iz"um),[key] —n. 1. (sometimes cap.) a movement in American Protestantism that arose in the early part of the 20th century in reaction to modernism and that stresses the infallibility of the Bible not only in matters of faith and morals but also as a literal historical record, holding as essential to Christian faith belief in such doctrines as the creation of the world, the virgin birth, physical resurrection, atonement by the sacrificial death of Christ, and the Second Coming.
2. the beliefs held by those in this movement.
3. strict adherence to any set of basic ideas or principles: the fundamentalism of the extreme conservatives.