infallible

adjective in·fal·li·ble \ (ˌ)in-ˈfa-lə-bəl \

Definition of infallible

1 :incapable of error :unerring
  • an infallible memory
2 :not liable to mislead, deceive, or disappoint :certain
  • an infallible remedy
3 :incapable of error in defining doctrines touching faith or morals

infallibility

play \(ˌ)in-ˌfa-lə-ˈbi-lə-tē\ noun

infallibly

play \(ˌ)in-ˈfa-lə-blē\ adverb

Examples of infallible in a Sentence

  1. I never claimed to be infallible.

  2. There is no infallible remedy to these problems.

Recent Examples of infallible from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infallible.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Did You Know?

Watch out when you hear about infallible predictions, an infallible plan, an infallible cure, or even infallible lip gloss. Infallible isn't a claim that scientists, engineers, and doctors like to make, so you're probably getting better information when the word not comes first. You may have heard the phrase "papal infallibility", which refers to the official position of the Roman Catholic church, adopted in the 19th century, that certain solemn statements made by a Pope about faith or morals were not to be questioned. Popes since then have been careful not to make many of these statements.

Origin and Etymology of infallible

Middle English, from Medieval Latin infallibilis, from Latin in- + Late Latin fallibilis fallible


INFALLIBLE Defined for English Language Learners

infallible

adjective

Definition of infallible for English Language Learners

  • : not capable of being wrong or making mistakes : not fallible

  • : certain to work properly or succeed


INFALLIBLE Defined for Kids

infallible

adjective in·fal·li·ble \ in-ˈfa-lə-bəl \

Definition of infallible for Students

1 :not capable of being wrong
  • an infallible memory
2 :certain to succeed :sure
  • an infallible remedy

infallibly

\-blē\ adverb


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