grammatical

"Grammatical" describes anything related to grammar, or anything that follows the rules that shape a language. It is often used to talk about whether a sentence, phrase, or word form is correct in structure. This is not only about punctuation or small classroom mistakes. It also includes how words change form, how they fit together in phrases, and how sentences are built.

You might describe a sentence as "grammatically correct" if it follows these rules. A "grammatical error" is a mistake in language use, such as the wrong verb tense, missing agreement between subject and verb, or a sentence pattern that does not work in that language. But the word can also be used more broadly. Linguists talk about grammatical forms, grammatical patterns, and grammatical systems when they study how a language works.

The term is not limited to writing. Spoken language has grammar too, and native speakers usually follow many of its rules without thinking about them. A skilled writer or speaker may be praised for strong grammatical control, meaning they use the language in a clear and correct way.

Sometimes, people break grammatical rules on purpose for style, especially in poetry, song lyrics, or informal speech and writing. Even then, the idea still points back to the normal rules of the language. So whether you are checking an essay, studying sentence patterns, or trying to speak clearly, "grammatical" is about the rule-based side of how language is formed and used.