First Known Use: 15th century
Dictionary
infallible
adjective in·fal·li·ble \(ˌ)in-ˈfa-lə-bəl\
: not capable of being wrong or making mistakes : not fallible
: certain to work properly or succeed
Full 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
— in·fal·li·bil·i·ty \-ˌfa-lə-ˈbi-lə-tē\ noun
— in·fal·li·bly \-ˈfa-lə-blē\ adverb
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Origin of INFALLIBLE
Middle English, from Medieval Latin infallibilis, from Latin in- + Late Latin fallibilis fallible
INFALLIBILITY Defined for Kids
infallible
adjective in·fal·li·ble \in-ˈfa-lə-bəl\
Definition of INFALLIBLE for Kids
1
: not capable of being wrong <an infallible memory>
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