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
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of infidelity
He was impeached in 2023 on bribery charges by the Texas House and was more recently accused of infidelity by his wife.
—
Brandi D. Addison, USA Today, 26 May 2026
When men publicly fail through addiction, infidelity, financial collapse or reckless behavior there can be room for complexity.
—Maia Niguel Hoskin, Forbes.com, 22 May 2026
The last season of the beloved sitcom had thrown fans for a loop, from Dan Conner's infidelity to the family's post-lottery win lifestyle.
—Angela Andaloro, PEOPLE, 21 May 2026
In 1672, Antonia Bembo – then living in the back part of a house known as Cà Bembo in the neighborhood of Santa Maria Nova – sued for divorce, citing Lorenzo’s infidelity along with mental and physical abuse.
—Claire Fontijn, The Conversation, 18 May 2026
See All Example Sentences for infidelity
Brandi D. Addison, USA Today, 26 May 2026
When men publicly fail through addiction, infidelity, financial collapse or reckless behavior there can be room for complexity.
—Maia Niguel Hoskin, Forbes.com, 22 May 2026
The last season of the beloved sitcom had thrown fans for a loop, from Dan Conner's infidelity to the family's post-lottery win lifestyle.
—Angela Andaloro, PEOPLE, 21 May 2026
In 1672, Antonia Bembo – then living in the back part of a house known as Cà Bembo in the neighborhood of Santa Maria Nova – sued for divorce, citing Lorenzo’s infidelity along with mental and physical abuse.
—Claire Fontijn, The Conversation, 18 May 2026
See All Example Sentences for infidelity
Recent Examples of Synonyms for infidelity
Noun
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The filings alleged adultery as the reason behind the divorce.—
Brandi D. Addison,
USA Today,
1 June 2026
-
Public opinion is against adultery.—
Louis Menand,
New Yorker,
1 June 2026
Noun
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But the mayor ought to answer why, in light of this seeming betrayal, businesses still should feel confident discussing sensitive matters with him.—
The Editorial Board,
Chicago Tribune,
4 June 2026
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From church pulpits to community gatherings, the policy U-turn was widely viewed as a betrayal of Black American shoppers who launched boycotts.—
Jessica Guynn,
USA Today,
3 June 2026
Noun
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No misconduct was issued to inmates during the incident in question, and no inmate faced discipline for refusing the assignment, the agency added.—
Paula Wethington,
CBS News,
8 June 2026
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Even without independent investigative authority, the commission has spent the past few years reviewing a backlog of internal affairs cases, commissioning an outside audit of police misconduct investigations and weighing in on department policies.—
Kelly Davis,
San Diego Union-Tribune,
8 June 2026
Noun
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Peacock’s adventures in treachery The Traitors was the top dog, scoring five prizes including Best Competition Series and Best Host for Alan Cumming.—
Erik Pedersen,
Deadline,
3 June 2026
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Upon learning of Ava’s treachery, Deborah HOWLS.—
Jessica M. Goldstein,
Vulture,
1 May 2026
Noun
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Some companies initially prohibited candidates from using AI during tests to prevent cheating.—
Lisa Eadicicco,
CNN Money,
28 May 2026
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In-person classes can still maintain some degree of rigor, and cheating can be reduced to zero as long as all assignments are done in the classroom.—
Jay Caspian Kang,
New Yorker,
26 May 2026
Noun
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To punish rebels for their treason, Parliament passed the Restraining Act of 1775, banning New Englanders from fishing on the Atlantic Ocean.—
Christopher Magra,
The Conversation,
2 June 2026
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Avital was generating support for her husband, who had been arrested a year before and charged with treason, and other Soviet dissidents.—
Michael Arkush,
Twin Cities,
26 May 2026
Cite this Entry
“Infidelity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infidelity. Accessed 9 Jun. 2026.
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