English Reference

Word

grammatical

Phoneticsgram·mat·i·cal

US/ɡɹəˈmætəkəɫ/

UK/ɡɹɐmˈætɪkəl/

Definitions

01correct according to rules

B2

adj. describes a sentence or phrase that follows the rules of a language correctly.

adj. conforming to the morphosyntactic rules of a specific language; well-formed.

“The teacher checked if the student's essay was grammatical and easy to read.”

“Native speakers often produce utterances that are perfectly functional in conversation even if they are not strictly grammatical in a formal sense.”

Pitfall

The student made a grammatical mistake.

The student made a grammar mistake.

While 'grammatical mistake' is common, 'grammar mistake' or 'error in grammar' is often preferred to avoid the contradiction of calling a mistake 'grammatical'.

Synonyms

well-formedcorrectacceptable

Antonyms

ungrammaticalincorrect

02relating to grammar

B2

adj. related to the study of the rules of a language.

adj. of or pertaining to the system and structure of a language.

“We spent the morning looking at different grammatical structures in the textbook.”

“The researcher analyzed the grammatical categories of the newly discovered dialect to determine its relationship to other regional languages.”

Academic

Real-World Examples

“He derived the Sanskrit term asamakālika from a- (not), sama (same) and kāla (time), which he then adapted to asamakālikamu in Telugu, in keeping with the grammatical rules of the language.”
Phys.org · 17 Aug 2026
“By the end of his life, Overton notes, the man’s spoken English has taken on the grammatical patterns of French.”
The Guardian · 10 Aug 2026

Etymology

From Middle French grammatical, from Latin grammaticālis.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

grammarNoungrammaticalAdjectivegrammaticallyAdverb

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

englishreference.com/q/grammatical

English Reference