infidelity
Americannoun
plural
infidelities-
marital disloyalty; adultery.
-
unfaithfulness; disloyalty.
-
lack of religious faith, especially Christian faith.
-
a breach of trust or a disloyal act; transgression.
noun
-
lack of faith or constancy, esp sexual faithfulness
-
lack of religious faith; disbelief
-
an act or instance of disloyalty
Etymology
Origin of infidelity
First recorded in 1375–1425; late Middle English, from Latin infidēlitās; equivalent to infidel + -ity
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Looking back over the 200+ episodes, the show covered such controversial topics as homosexuality, racism, the Vietnam War, labor unions and infidelity.
From The Wall Street Journal • Mar. 18, 2026
His renaissance man biography includes a career as a body builder, highlighted by his Mr. Universe titles, action film success, political stardom and even tabloid-fodder infidelity.
From Los Angeles Times • Mar. 3, 2026
Financial infidelity is at least as damaging to a marriage and a couple’s livelihood as other kinds of secrecy and unfaithfulness.
From MarketWatch • Mar. 2, 2026
Singer Billie Eilish — one of Wasserman’s clients at his entertainment agency — stepped away from his firm because of the infidelity allegations, according to the Hollywood Reporter.
From Los Angeles Times • Feb. 4, 2026
Up until the time of Harriet’s discovery of John Tubman’s infidelity, she had been guiding escaping slaves to the North and freedom largely because she wanted to rescue members of her own family.
From "Harriet Tubman: Conductor on the Underground Railroad" by Ann Petry
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
