Definify.com
Webster 1913 Edition
Infallible
In-fal′li-ble
,Adj.
[Pref.
in-
not + fallible
: cf. F. infallible
.] 1.
Not fallible; not capable of erring; entirely exempt from liability to mistake; unerring; inerrable.
Dryden.
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.
(R. C. Ch.)
Incapable of error in defining doctrines touching faith or morals. See
Papal infallibility
, under Infallibility
.