1
as in adultery
lack of faithfulness especially to one's husband or wife
infidelity can lead to divorce
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in betrayal
the act or fact of violating the trust or confidence of another
the one thing that the political boss will not forgive is infidelity
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in misconduct
a sexual encounter or relationship between a married person and someone other than their spouse
had known about his wife's infidelities for years
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of infidelity
Tensions notably come to a head between Bennie and his sister-in-law, Lucretia (a game Wanda Sykes), because of his past infidelity, which provides some of the sitcom's funniest moments via razor-sharp one-liner wars.
—
Andrew Walsh, Entertainment Weekly, 5 Apr. 2026
Woods later admitted to infidelity and took a break from golf.
—Megan Armstrong, MSNBC Newsweek, 31 Mar. 2026
With whom, by whom, and thanks to whom is of no significance to him whatsoever, so it can hardly be considered infidelity.
—Agnieszka Szpila, Harpers Magazine, 24 Mar. 2026
Fans were outraged when rumors of infidelity on the Irish actor’s part began to circulate.
—Fleurine Tideman, Glamour, 23 Mar. 2026
See All Example Sentences for infidelity
Andrew Walsh, Entertainment Weekly, 5 Apr. 2026
Woods later admitted to infidelity and took a break from golf.
—Megan Armstrong, MSNBC Newsweek, 31 Mar. 2026
With whom, by whom, and thanks to whom is of no significance to him whatsoever, so it can hardly be considered infidelity.
—Agnieszka Szpila, Harpers Magazine, 24 Mar. 2026
Fans were outraged when rumors of infidelity on the Irish actor’s part began to circulate.
—Fleurine Tideman, Glamour, 23 Mar. 2026
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
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The Bible teaches that lying, stealing, adultery and coveting your neighbor’s property are sins.—
Sun Sentinel Editorial Board,
Sun Sentinel,
16 Mar. 2026
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The facile novelty of adultery is its own mask, a sexy way of dressing up a deep, frightened longing for security.—
Sara Holdren,
Vulture,
6 Mar. 2026
Noun
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SoulCycle, Flywheel, Peloton — the billion-dollar boutique fitness revolution built on ambition, betrayal and toxic sweat.—
Ryan Lattanzio,
IndieWire,
16 Apr. 2026
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To do so—and this book is my attempt—would not, could not constitute a betrayal.—
Literary Hub,
Literary Hub,
15 Apr. 2026
Noun
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British police launched a criminal probe and arrested Mandelson in February on suspicion of misconduct in public office.—
Jill Lawless,
Los Angeles Times,
20 Apr. 2026
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Labor Secretary Lori Chavez-DeRemer is leaving her post amid an internal investigation brought on by complaints about misconduct by the secretary while in office.—
Andrea Hsu,
NPR,
20 Apr. 2026
Noun
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Inflamed by Ratansen’s adviser’s account of Padmavati’s beauty, Alauddin Khalji storms the fortress by treachery rather than valor.—
Encyclopedia Britannica,
Encyclopedia Britannica,
9 Apr. 2026
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But Bateman's treachery also had a distinctly silly side.—
Ryan Coleman,
Entertainment Weekly,
8 Apr. 2026
Noun
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But even for in-person classes, adaptations to prevent LLM cheating are often concessions that reduce pedagogical quality.—
ArsTechnica,
ArsTechnica,
13 Apr. 2026
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Time and again, the panel of experts invited to provide testimony said voter fraud is exceedingly rare and that there is no evidence of widespread cheating.—
Linh Tat,
Daily News,
8 Apr. 2026
Noun
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Russia’s Federal Security Service detained a former freelance journalist for Radio Free Europe/Radio Liberty in eastern Siberia on charges of treason.—
Bloomberg News,
Bloomberg,
9 Apr. 2026
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Consider this evilmeister’s brazen acts of treason and revenge, unbounded deceit, swinish immorality and negative role modeling.—
Voice of the People,
New York Daily News,
5 Apr. 2026
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 23 Apr. 2026.
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