unfaithful
adjective
un·faith·ful
ˌən-ˈfāth-fəl 
: 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
unfaithfulness
noun
Synonyms
Examples of unfaithful in a Sentence
colonists who later proved to be unfaithful to the cause of independence
Recent Examples on the Web
Serially bankrupt and unfaithful, Trump sought prayers from both Catholic and protestant religious dignitaries who condemn such things among their faithful and wink at them from Trump.
—
David Mastio, The Mercury News, 22 Jan. 2025
Camil previously appeared in four episodes of the multi-camera series during its second season in the role of Josué Consuelos, the unfaithful ex-boyfriend of Rosie (Selenis Leyva).
—Joe Otterson, Variety, 6 Dec. 2024
The Singularity, published three years earlier, during the same affair, concerns a scientist who turns a mountain into a supercomputer and gives it the personality of his dead wife, a younger woman who was persistently unfaithful to him.
—Christopher Tayler, Harper's Magazine, 2 Jan. 2025
Green asked the reporter, who alleged that the singer was unfaithful to his former fiancée.
—Julia Moore, People.com, 13 Dec. 2024
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David Mastio, The Mercury News, 22 Jan. 2025
Camil previously appeared in four episodes of the multi-camera series during its second season in the role of Josué Consuelos, the unfaithful ex-boyfriend of Rosie (Selenis Leyva).
—Joe Otterson, Variety, 6 Dec. 2024
The Singularity, published three years earlier, during the same affair, concerns a scientist who turns a mountain into a supercomputer and gives it the personality of his dead wife, a younger woman who was persistently unfaithful to him.
—Christopher Tayler, Harper's Magazine, 2 Jan. 2025
Green asked the reporter, who alleged that the singer was unfaithful to his former fiancée.
—Julia Moore, People.com, 13 Dec. 2024
See all Example Sentences for unfaithful
Dictionary Entries Near unfaithful
Cite this Entry
“Unfaithful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfaithful. Accessed 6 Feb. 2025.
Copy CitationKids Definition
unfaithful
adjective
un·faith·ful
ˌən-ˈfāth-fəl
ˈən-
1
: not observing vows, allegiance, or duty : disloyal
an unfaithful friend
2
: not faithful to marriage vows
3
: inaccurate
an unfaithful translation
unfaithfulness
noun
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