Without fault or weakness; incapable of error or fallacy.
‘He knows about many things, but even he is not infallible.’;
Certain to produce the intended effect, sure.
‘Try this infallible cure for hiccups.’;
Not fallible; not capable of erring; entirely exempt from liability to mistake; unerring; inerrable.
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.’;
Incapable of error in defining doctrines touching faith or morals. See Papal infallibility, under Infallibility.
incapable of failure or error;
‘an infallible antidote’; ‘an infallible memmory’; ‘the Catholic Church considers the Pope infallible’; ‘no doctor is infallible’;