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Definition of Infallible
1. Adjective. Incapable of failure or error. "No doctor is infallible"
Antonyms: Fallible
Derivative terms: Infallibility
Definition of Infallible
1. a. Not fallible; not capable of erring; entirely exempt from liability to mistake; unerring; inerrable.
Definition of Infallible
1. Adjective. Without fault or weakness; incapable of error or fallacy. ¹
2. Adjective. certain, sure. ¹
¹ Source: wiktionary.com
Definition of Infallible
1. [adj]
Medical Definition of Infallible
1. 1. Not fallible; not capable of erring; entirely exempt from liability to mistake; unerring; inerrable. 2. Not liable to fail, deceive, or disappoint; indubitable; sure; certain; as, infallible evidence; infallible success; an infallible remedy. "To whom also he showed himself alive, after his passion, by many infallible proofs." (Acts i. 3) 3. Incapable of error in defining doctrines touching faith or morals. See Papal infallibility, under Infallibility. Origin: Pref. In- not + fallible: cf. F. Infallible. Source: Websters Dictionary (01 Mar 1998)