ungrammatical

adjective

: not following rules of grammar
an ungrammatical sentence
In another of his ipse dixit pronouncements, Webster condemned the adverbial use of adjectives in phrases like extreme cold, exceeding fine, and indifferent well as "very improper and ungrammatical." Edward Finegan
Surprisingly, even though it sounds ungrammatical, can't seem is accepted as a standard idiom that is no less awkward than saying "seems to be unable," … HarperCollins Publishers
Idioms are forms of expression approved by usage, but often ungrammatical and illogical. Simeon Potter

Examples of ungrammatical in a Sentence

the résumé and its ungrammatical cover letter were summarily thrown in the trash
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
And in general, the A.I. bots were useful for sharpening prose and cleaning up clunky, ungrammatical sentences. Brian X. Chen, New York Times, 1 Feb. 2023 That could be useful for conversations where telegraphic, ungrammatical messages would come off as impolite. Tom Simonite, Wired, 18 Oct. 2020

Word History

First Known Use

1654, in the meaning defined above

Time Traveler
The first known use of ungrammatical was in 1654

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Cite this Entry

“Ungrammatical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ungrammatical. Accessed 30 Mar. 2025.

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