papal infallibility

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Roman Catholicism The concept that the Pope, under certain circumstance (when making a statement on faith or morals, etc.) is protected by the Holy Spirit from being able to make a mistake.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun belief of the Roman Catholic Church that God protects the pope from error when he speaks about faith or morality