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
The video features a devastated-looking Timberlake invading the home of his unfaithful ex-girlfriend, who bears a resemblance to Spears.
—
Martha Ross, The Mercury News, 5 Mar. 2024
That is, until Dexter—fresh off a divorce from his unfaithful first wife Sylvie (Eleanor Tomlinson), the mother of his daughter Jasmine (Billie Gadsdon)—visits Emma in Paris to declare his feelings for her.
—Megan McCluskey, TIME, 8 Feb. 2024
See all Example Sentences for unfaithful 
Martha Ross, The Mercury News, 5 Mar. 2024
That is, until Dexter—fresh off a divorce from his unfaithful first wife Sylvie (Eleanor Tomlinson), the mother of his daughter Jasmine (Billie Gadsdon)—visits Emma in Paris to declare his feelings for her.
—Megan McCluskey, TIME, 8 Feb. 2024
See all Example Sentences for unfaithful
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'unfaithful.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near unfaithful
Cite this Entry
“Unfaithful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfaithful. Accessed 29 May. 2024.
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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