adjective

grammatical

gruh-MAT-ih-kul/ɡrəˈmætɪkl/

Relating to grammar or following its rules.

The diagram shows the sentence's grammatical structure by separating its subject and verb.

A minimal traditional sentence diagram makes language structure visible: “Birds fly” sits on a horizontal baseline, with a vertical divider separating the subject from the verb.

Etymology

grammatGreekletter

+icGreekpertaining to

+alLatinpertaining to

The “letters” behind grammatical connect it to the broad study of literature and learning. As grammar narrowed to a systematic account of language rules, the adjective acquired its current focus.

In context

The Neoliberal Round by Renaldo Mckenzie8:29

… he puts a period there so while some traditionalists may still prefer to avoid split infinitives in certain situations it is no longer considered a grammatical error in contemporary English …

Is Splitting the Infinitive Grammatically Correct in Modern English?

More examples

A sentence can be grammatical without making sense.
We learn grammatical rules by listening as well as studying.
The two languages use different grammatical patterns.

Forms

grammatical

grammar noun — The rules governing word forms and combinations.

grammatically adverb — With respect to the rules of grammar.

Similar words

syntactic: Refers specifically to sentence structure, not all grammar rules.
correct: Can describe accuracy beyond adherence to grammar rules.