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
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
These include infidelities, unspoken longings, and thorny questions of land inheritance.
—
The New Yorker, New Yorker, 2 June 2025
This places the blame on the victim rather than the perpetrator of infidelity.
—Mark Travers, Forbes.com, 2 June 2025
In 2023, Korie and Willie produced The Blind, a film about Phil and Kay Robertson that also explores the former's infidelity, alcoholism, and faith journey.
—Allison Degrushe, EW.com, 31 May 2025
If trapped in a situation involving domestic abuse, spousal infidelity, or romantic coercion, any action a woman takes can be justified or understood.
—Roxana Hadadi, Vulture, 29 May 2025
See All Example Sentences for infidelity
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The New Yorker, New Yorker, 2 June 2025
This places the blame on the victim rather than the perpetrator of infidelity.
—Mark Travers, Forbes.com, 2 June 2025
In 2023, Korie and Willie produced The Blind, a film about Phil and Kay Robertson that also explores the former's infidelity, alcoholism, and faith journey.
—Allison Degrushe, EW.com, 31 May 2025
If trapped in a situation involving domestic abuse, spousal infidelity, or romantic coercion, any action a woman takes can be justified or understood.
—Roxana Hadadi, Vulture, 29 May 2025
See All Example Sentences for infidelity
Cite this Entry
“Infidelity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infidelity. Accessed 12 Jun. 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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