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Definitions

ungrammatical

[uhn-gruh-mat-i-kuhl] / ˌʌn grəˈmæt ɪ kəl /
ADJECTIVE
not using the correct rules of grammar
Synonyms
Antonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Yet, somehow, he was producing paragraphs of eighth-grade level prose instead of the barely-intelligible and ungrammatical screeds — fourth-grade level prose, according to a 2024 New York Times analysis — he usually whips out.

From Salon • Sep. 3, 2025

Like most writers, I can be a stickler about language, but anyone who hangs out with me for long enough will learn that I favor a certain ungrammatical turn of phrase: “true fact.”

From The New Yorker • Dec. 19, 2018

First, seemingly thrown by syntactical complexity, it suggests that I should replace “there in a” with “there is a,” a change that would be ungrammatical, but that still leaves me questioning my own stylistic choices.

From Slate • Feb. 7, 2018

Me and my ilks, she wrote in a purposely ungrammatical way, get set in our ways, too, and have expectations of a certain level of knowledge, decorum and protocol.

From Washington Post • Feb. 17, 2017

Teachers need a simple way to teach them how to break sentences, so they tell them that sentences beginning with and and other conjunctions are ungrammatical.

From "The Sense of Style" by Steven Pinker