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
In last week’s episode, Conrad finally broke down on the beach and confessed his true feelings for Belly after discovering Jeremiah’s infidelity in Cabo.
—
Monica Mercuri, Forbes.com, 26 Aug. 2025
The moment ignited speculation of infidelity across social media as video of the exchange went viral.
—Christina Dugan Ramirez, FOXNews.com, 24 Aug. 2025
That there is impotence and cancer and infidelity and vanity and loss.
—Lyz Lenz, Rolling Stone, 16 Aug. 2025
On her Pre-Game podcast earlier this year, Nicole spoke about the insecurities and pain that stemmed from infidelity in a past relationship, fueling speculation about her time with Kelce.
—Amber Corrine, VIBE.com, 3 Sep. 2019
See All Example Sentences for infidelity
Monica Mercuri, Forbes.com, 26 Aug. 2025
The moment ignited speculation of infidelity across social media as video of the exchange went viral.
—Christina Dugan Ramirez, FOXNews.com, 24 Aug. 2025
That there is impotence and cancer and infidelity and vanity and loss.
—Lyz Lenz, Rolling Stone, 16 Aug. 2025
On her Pre-Game podcast earlier this year, Nicole spoke about the insecurities and pain that stemmed from infidelity in a past relationship, fueling speculation about her time with Kelce.
—Amber Corrine, VIBE.com, 3 Sep. 2019
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
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In addition, Swazi law has a different definition of adultery for men and for women.—
The Editors,
JSTOR Daily,
15 Aug. 2025
-
Certain artistic genres were employed to publicize and critique changes to laws regarding adultery and divorce.—
Smithsonian Magazine,
Smithsonian Magazine,
29 July 2025
Noun
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But for students who have spent years—and significant financial sums—on their education, struggling to land one's first job may feel like a betrayal.—
Hugh Cameron,
MSNBC Newsweek,
4 Sep. 2025
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So this is a temporary hiccup—Indians will be unhappy, anti-Americanism will once again grow within the country’s strategic elite, and stories of American betrayals will persist for years.—
Happymon Jacob,
Time,
3 Sep. 2025
Noun
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Boy Meets World — Savage’s comedy legacy has been marred by multiple misconduct allegations over the years.—
Emily Blackwood,
PEOPLE,
5 Sep. 2025
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The senior pastor at the historic First Presbyterian Church of Charlotte in uptown was fired after allegations of misconduct proved true, the church said in an email Wednesday.—
Charlotte Observer,
Charlotte Observer,
4 Sep. 2025
Noun
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When does compromise become treachery or defeat?—
Literary Hub,
Literary Hub,
3 Sep. 2025
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Could Juno be behind this treachery, as payback for David destroying her spy corporation and for changing his oldest daughter into a killer?—
Demetrius Patterson,
HollywoodReporter,
27 Aug. 2025
Noun
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When yet another affair is discovered (Kate Upton), all three women team up to plot mutual revenge on their cheating, lying, three-timing SOB.—
Caitlin White,
Variety,
2 Sep. 2025
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Byron had his arms wrapped around the company's HR chief, Kristin Cabot, and subsequently faced cheating allegations after they were spotted on the jumbotron.—
Megan Cartwright,
MSNBC Newsweek,
1 Sep. 2025
Noun
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The main opposition party, CHADEMA, was disqualified in April and its leader Tundu Lissu remains in custody after he was charged with treason for demanding electoral reforms.—
Preeti Jha,
semafor.com,
29 Aug. 2025
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Ksenia Mironova copes with the absence of her fiancé, also a journalist, who is in prison on charges of treason.—
Justin Chang,
New Yorker,
14 Aug. 2025
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 8 Sep. 2025.
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