- 1never wrong; never making mistakes infallible advice Doctors are not infallible. opposite fallible
- 2that never fails; always doing what it is supposed to do an infallible method of memorizing things
NAmE//ɪnˌfæləˈbɪlət̮i//
noun [uncountable] his belief in the infallibility of dreams as a guide to the future papal infallibility NAmE//ɪnˈfæləbli//
adverbSee infallible in the Oxford Advanced Learner's DictionaryCheck pronunciation: infallible