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Definition of infidelity

infidelity

/ˌɪn.fɪˈdɛl.ə.ti/
in · fi · del · i · ty
Plural:infidelities
•
Adjective:infidel
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infidelity Lexical Profile

infidelity Game Scores & Validity

• noun

1

The action or state of being unfaithful to a spouse or other romantic partner.

Example

"Their twenty-year marriage ultimately ended in divorce due to persistent infidelity."

2

Disbelief in or rejection of a particular religion, especially Christianity or Islam (archaic or formal).

Example

"Eighteenth-century theologians frequently published tracts defending orthodox doctrine against what they termed philosophical infidelity."

Synonyms
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Antonyms
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• Rhymes for infidelity

• Nearby Words

infest
infestation
infidel
infidelity
infield
infielder
infighting

Word Origin & Etymology

Borrowed in the late 15th century from Old French infidelite or directly from Latin infidelitas ('unfaithfulness'), from infidelis ('unfaithful'), formed from in- ('not') and fidelis ('faithful').

Cite this Entry

Wordmom. (2026). Definition of Infidelity. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/infidelity
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