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
Synonyms
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
She’s spoken in the past about her ex-husband’s infidelity.
—
Elizabeth Ayoola, Essence, 23 May 2024
In the trailer for Apple TV+’s latest limited series Presumed Innocent, Gyllenhaal, 43, assumes the role of chief deputy prosecutor Rusty Sabich, a family man whose infidelity comes to light when he is suspected of murdering his mistress.
—Brendan Le, Peoplemag, 22 May 2024
See all Example Sentences for infidelity 
Elizabeth Ayoola, Essence, 23 May 2024
In the trailer for Apple TV+’s latest limited series Presumed Innocent, Gyllenhaal, 43, assumes the role of chief deputy prosecutor Rusty Sabich, a family man whose infidelity comes to light when he is suspected of murdering his mistress.
—Brendan Le, Peoplemag, 22 May 2024
See all Example Sentences for infidelity
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'infidelity.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Infidelity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infidelity. Accessed 28 May. 2024.
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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