1. the quality of being incapable of making mistakes or being wrong
2. the doctrine that the Pope cannot err when speaking officially on matters of faith and morals
Usage: religious; Catholic theology

Examples

• Many people mistakenly believe in their own infallibility when making decisions.
• The concept of papal infallibility was formally defined in 1870.
• Scientists reject claims of infallibility in any theory or hypothesis.
• His arrogance stemmed from a false sense of infallibility.
• The doctrine of infallibility applies only to specific papal pronouncements.
• No human possesses true infallibility in judgment.
• The debate over infallibility divided the Catholic Church for centuries.