infidelity
noun
in·fi·del·i·ty
ˌin-fə-ˈde-lə-tē 
-(ˌ)fī-
plural infidelities
1
a
: the act or fact of having a romantic or sexual relationship with someone other than one's husband, wife, or partner
b
: unfaithfulness to a moral obligation : disloyalty
2
: lack of belief in a religion
Synonyms
Examples of infidelity in a Sentence
She was convinced that her husband was guilty of infidelity.
He has admitted to a number of marital infidelities.
Recent Examples on the Web
Democrats on the Senate Armed Services Committee failed to land a decisive blow against Pete Hegseth, President-elect Trump’s nominee to serve as secretary of Defense, after several hours of tense questioning about his qualifications, views on women in combat, infidelity and drinking.
—
Alexander Bolton, The Hill, 15 Jan. 2025
Again, one needn’t endorse Trump’s infidelity or lies to observe that the spectacle disserves the country.
—The Editors, National Review, 15 Jan. 2025
If the season 11 trailer is any indicator, fans can look forward to plenty of infidelity, betrayal, and so many fights and tears.
—Sydney Bucksbaum, EW.com, 14 Jan. 2025
Blue has faced much criticism for targeting younger men and also for her comments blaming women for their husband's infidelity.
—John Mac Ghlionn, Newsweek, 14 Jan. 2025
See all Example Sentences for infidelity 
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Alexander Bolton, The Hill, 15 Jan. 2025
Again, one needn’t endorse Trump’s infidelity or lies to observe that the spectacle disserves the country.
—The Editors, National Review, 15 Jan. 2025
If the season 11 trailer is any indicator, fans can look forward to plenty of infidelity, betrayal, and so many fights and tears.
—Sydney Bucksbaum, EW.com, 14 Jan. 2025
Blue has faced much criticism for targeting younger men and also for her comments blaming women for their husband's infidelity.
—John Mac Ghlionn, Newsweek, 14 Jan. 2025
See all Example Sentences for infidelity
Articles Related to infidelity
Dictionary Entries Near infidelity
Cite this Entry
“Infidelity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infidelity. Accessed 22 Jan. 2025.
Copy CitationKids Definition
infidelity
noun
in·fi·del·i·ty
ˌin-fə-ˈdel-ət-ē
-(ˌ)fī-
plural infidelities
1
: lack of faith in a religion
2
: unfaithfulness especially to one's husband or wife
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