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
Her subsequent attempts to uncover some sign of infidelity — or at least a scrap of emotional cheating to justify her own — make everyone so uncomfortable that Dylan eventually just calls it and tells everyone to leave.
—
Caroline Framke, Vulture, 8 Dec. 2025
Even with dating apps, hookup sites and social media platforms offering more access to potential partners than ever before, many millennials appear to be opting out of infidelity altogether.
—Melissa Fleur Afshar, MSNBC Newsweek, 6 Dec. 2025
Her amour fou with lothario bartender Jax Taylor set the tone for a soap whose throughline was infidelity, with the women repeatedly sleuthing out their boyfriends’ indiscretions as the men tried to cover for each other.
—Judy Berman, Time, 4 Dec. 2025
That mourning, displacing infidelity, has been restored to its central place in Shakespeare’s inspiration is perhaps a good thing, though not necessarily a true one.
—James Shapiro, The Atlantic, 1 Dec. 2025
See All Example Sentences for infidelity
Caroline Framke, Vulture, 8 Dec. 2025
Even with dating apps, hookup sites and social media platforms offering more access to potential partners than ever before, many millennials appear to be opting out of infidelity altogether.
—Melissa Fleur Afshar, MSNBC Newsweek, 6 Dec. 2025
Her amour fou with lothario bartender Jax Taylor set the tone for a soap whose throughline was infidelity, with the women repeatedly sleuthing out their boyfriends’ indiscretions as the men tried to cover for each other.
—Judy Berman, Time, 4 Dec. 2025
That mourning, displacing infidelity, has been restored to its central place in Shakespeare’s inspiration is perhaps a good thing, though not necessarily a true one.
—James Shapiro, The Atlantic, 1 Dec. 2025
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
-
Bianca filed for divorce on the grounds of adultery in 1978, a year after Mick started seeing model Jerry Hall.—
Marina Watts,
PEOPLE,
30 Oct. 2025
-
As China’s economy has grown, so too has its incidence of adultery.—
Sheri Linden,
HollywoodReporter,
23 Oct. 2025
Noun
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In June 2025, Peacock revealed the latest slate of celebrities set to battle it out in a high-stakes game of lies, alliances and betrayal inside a castle in the Scottish Highlands — all for a chance to win up to $250,000.—
Samantha Stutsman,
PEOPLE,
8 Jan. 2026
-
Rumors of treason, incompetence and betrayal swirled.—
Antonio María Delgado,
Miami Herald,
8 Jan. 2026
Noun
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Its investigative arm reviews officer misconduct complaints, and is expected to one day replace the police department’s internal affairs division.—
Shomik Mukherjee,
Mercury News,
9 Jan. 2026
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The panel assessed the LAPD’s handling of discipline, misconduct complaints, excessive force by officers and other issues.—
David Zahniser,
Los Angeles Times,
9 Jan. 2026
Noun
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With season 4 rapidly approaching, now's the time to prepare for the treachery to come.—
Randall Colburn,
Entertainment Weekly,
22 Dec. 2025
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Instead of being killed, Ashur takes Spartacus’ life and is consequently rewarded for his treachery by the Roman Empire.—
Aramide Tinubu,
Variety,
1 Dec. 2025
Noun
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Instead, tax enforcement has been starved, and large-scale cheating has proliferated.—
Washington Post,
Washington Post,
8 Jan. 2026
-
The process seems to be amicable; there was no cheating or abuse.—
Jeanne Phillips,
Mercury News,
6 Jan. 2026
Noun
-
Rumors of treason, incompetence and betrayal swirled.—
Antonio María Delgado,
Miami Herald,
8 Jan. 2026
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His Administration has also accused political rivals, including Democratic lawmakers and former President Barack Obama, of sedition and treason.—
Chad de Guzman,
Time,
10 Dec. 2025
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 11 Jan. 2026.
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