unfaithful

adjective

un·​faith·​ful ˌən-ˈfāth-fəl How to pronounce unfaithful (audio)
: not faithful:
a
: not adhering to vows, allegiance, or duty : disloyal
an unfaithful friend
b
: not faithful to marriage vows
suspected her husband of being unfaithful
c
: inaccurate, untrustworthy
an unfaithful copy of a document
unfaithfully adverb
unfaithfulness noun

Example Sentences

colonists who later proved to be unfaithful to the cause of independence
Recent Examples on the Web Approximately seven years ago, my husband was unfaithful. Annie Lane, oregonlive, 13 Nov. 2022 Approximately seven years ago, my husband was unfaithful. Annie Lane, cleveland, 13 Nov. 2022 There's no proof he's ever been unfaithful, but over the course of the royal couples' 70+ year partnership, the Duke of Edinburgh has been labeled a ladies man, and linked to numerous women, perhaps most notably stage actress Pat Kirkwood. Caroline Hallemann, Town & Country, 9 Nov. 2022 The couple then split briefly in 2016 after Sharon learned Ozzy had been unfaithful. Brianne Tracy, Peoplemag, 15 Sep. 2022 One of them decamps to her in-laws’ house in Connecticut; the other soon departs as well, after learning that her husband has been unfaithful and had been planning to leave her. Laura Miller, The New Yorker, 12 Sep. 2022 The dismissal comes just under two weeks after Branch filed for divorce from Carney on Aug. 15, amid her claim that her husband had been unfaithful. Joey Nolfi, EW.com, 25 Aug. 2022 The analysis showed the most unfaithful city in the U.S. was Dallas, Texas. Leada Gore | Lgore@al.com, al, 24 Aug. 2022 The comedy, which is currently airing on Apple TV+, stars Rudolph as Molly Wells, a woman who comes into an $87 billion settlement after divorcing her unfaithful tech entrepreneur husband (Severance's Adam Scott). Leena Kim, Town & Country, 5 Aug. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unfaithful.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of unfaithful was in the 15th century

Dictionary Entries Near unfaithful

Cite this Entry

“Unfaithful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfaithful. Accessed 30 Nov. 2022.

Kids Definition

unfaithful

adjective

un·​faith·​ful ˌən-ˈfāth-fəl How to pronounce unfaithful (audio)
ˈən-
1
: not observing vows, allegiance, or duty : disloyal
an unfaithful friend
2
: not faithful to marriage vows
3
: inaccurate
an unfaithful translation
unfaithfully adverb
unfaithfulness noun

More from Merriam-Webster on unfaithful

Last Updated: - Updated example sentences
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