|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; |
|3.||(R. C. Ch.) Incapable of error in defining doctrines touching faith or morals. See |
|Adj.||1.||infallible - incapable of failure or error; "an infallible antidote"; "an infallible memmory"; "the Catholic Church considers the Pope infallible"; "no doctor is infallible"|
fallible - likely to fail or be inaccurate; "everyone is fallible to some degree"