- The definition of infallible is someone or something that is always perfect and right, without any errors or mistakes.
An example of infallible are the decisions of God.
infallible definition by Webster's New World
- incapable of error; never wrong
- not liable to fail, go wrong, make a mistake, etc.; dependable; reliable; sure
- R.C.Ch. incapable of error in setting forth doctrine on faith and morals: said esp. of the pope speaking ex cathedra (i.e., in his official capacity)
Origin: Midieval Latin infallibilis: see in- and amp; fallible
infallible definition by American Heritage Dictionary
- Incapable of erring: an infallible guide; an infallible source of information.
- Incapable of failing; certain: an infallible antidote; an infallible rule.
- Roman Catholic Church Incapable of error in expounding doctrine on faith or morals.
Origin: Middle English, from Medieval Latin īnfallibilis : Latin in-, not; see in-1 + Medieval Latin fallibilis, fallible; see fallible.
- in·falˌli·bilˈi·ty, in·falˈli·ble·ness noun
- in·falˈli·bly adverb