infidelity

[ in-fi-del-i-tee ]

noun

, plural in·fi·del·i·ties.

1. marital disloyalty; adultery.
2. unfaithfulness; disloyalty.
3. lack of religious faith, especially Christian faith.
4. a breach of trust or a disloyal act; transgression.

infidelity

/ ˌɪnfɪˈdɛlɪtɪ /

noun

1. lack of faith or constancy, esp sexual faithfulness
2. lack of religious faith; disbelief
3. an act or instance of disloyalty

Word History and Origins

Origin of infidelity¹

First recorded in 1375–1425; late Middle English, from Latin infidēlitās; equivalent to infidel + -ity

Example Sentences

Stewart said she did when she worked as a stockbroker on Wall Street in the 1960s, but Andy never knew of her infidelity.

From Salon

Martha Stewart doesn't do warts, but Cutler edits a wry irony into the artful coverage she dabs on her blemishes, like her refusal to count her marital infidelity as equivalent to that of her husband.

From Salon

During a discussion of her husband’s infidelity, she says, “If you’re married and your husband starts to cheat on you, he’s a piece of s—.” Cutler, off camera, brings up the fact that she too,had an affair early in her marriage.

From Los Angeles Times

More disturbing is Zehme’s willingness to underplay Carson’s lifelong habit of infidelity and his catastrophic relationship with alcohol.

From Los Angeles Times

In March 2023, infidelity rumors regarding longtime partner Sebastian Lletget began to swirl on the internet, prompting a public statement by the FC Dallas midfielder where he apologized to Becky and announced that he was committing himself to a mental wellness program.

From Los Angeles Times

Related Words

• adultery
• affair
• betrayal
• duplicity
• treachery