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
Examples of unfaithful in a Sentence
colonists who later proved to be unfaithful to the cause of independence
Recent Examples on the Web
While together, Odom struggled with addiction and was unfaithful in their relationship.
—
Michael Nied, People.com, 16 Apr. 2025
Intriguingly, the researchers found that these unfaithful chains-of-thought were, on average, longer than faithful ones, suggesting the omissions weren't merely for brevity.
—ArsTechnica, 10 Apr. 2025
The play, which was co-produced by Burruss and her longtime husband Todd Tucker, is a tragedy about a commander who is manipulated into thinking his wife is unfaithful.
—Elizabeth Ayoola, Essence, 27 Mar. 2025
The Shakespearian plot revolves around Othello as a military commander who is convinced that his wife has been unfaithful by his ensign, Iago.
—Lisa Respers France, CNN, 24 Mar. 2025
See All Example Sentences for unfaithful
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Michael Nied, People.com, 16 Apr. 2025
Intriguingly, the researchers found that these unfaithful chains-of-thought were, on average, longer than faithful ones, suggesting the omissions weren't merely for brevity.
—ArsTechnica, 10 Apr. 2025
The play, which was co-produced by Burruss and her longtime husband Todd Tucker, is a tragedy about a commander who is manipulated into thinking his wife is unfaithful.
—Elizabeth Ayoola, Essence, 27 Mar. 2025
The Shakespearian plot revolves around Othello as a military commander who is convinced that his wife has been unfaithful by his ensign, Iago.
—Lisa Respers France, CNN, 24 Mar. 2025
See All Example Sentences for unfaithful
Cite this Entry
“Unfaithful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfaithful. Accessed 7 May. 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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