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
Researchers set out to explore why public reactions to celebrity infidelity vary so widely.
—
Mark Travers, Forbes.com, 8 July 2025
The source also claimed that there were multiple instances of infidelity.
—Jason Pham, StyleCaster, 8 July 2025
In Just Keke, Palmer explores the not-so-pretty side of love, and many will be able to relate to the uncomfortable truths that come along with infidelity and broken bonds.
—Lynnette Nicholas, Essence, 7 July 2025
The Secret Lives of Mormon Wives is gearing up for a wild season 3 after last season ended with a shocking allegation of infidelity.
—EW.com, 3 July 2025
See All Example Sentences for infidelity
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Mark Travers, Forbes.com, 8 July 2025
The source also claimed that there were multiple instances of infidelity.
—Jason Pham, StyleCaster, 8 July 2025
In Just Keke, Palmer explores the not-so-pretty side of love, and many will be able to relate to the uncomfortable truths that come along with infidelity and broken bonds.
—Lynnette Nicholas, Essence, 7 July 2025
The Secret Lives of Mormon Wives is gearing up for a wild season 3 after last season ended with a shocking allegation of infidelity.
—EW.com, 3 July 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 18 Jul. 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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