grammatical

adjective

gram·​mat·​i·​cal grə-ˈma-ti-kəl 

1

: of or relating to grammar

2

: conforming to the rules of grammar

a grammatical sentence

grammaticality

grə-ˌma-tə-ˈka-lə-tē 

noun

grammaticalness

grə-ˈma-ti-kəl-nəs 

noun

Examples of grammatical in a Sentence

That sentence is not grammatical.

Recent Examples on the Web

Even this basic illustration shows that human English includes variation in word usage and grammatical structures that breaks up information and conveys personal meaning. —Laura Aull, The Conversation, 20 Mar. 2026

Some people—in fear of being accused of using AI—are purposely inserting grammatical errors or typos to make their prose look more human, experts say. —Angela Haupt, Time, 9 Feb. 2026

Searching the documents is difficult for a number of reasons, including Epstein’s voluminous misspellings and grammatical errors. —Noelle Phillips, Denver Post, 8 Feb. 2026

More than this, Smart’s project, an ongoing one, seems to have transcended the grammatical and become devotional. —Hermione Hoby, New Yorker, 26 Jan. 2026

Word History

Etymology

borrowed from Middle French and Late Latin; Middle French grammaticale, borrowed from Late Latin grammaticālis, from Latin grammatica grammar + -ālis -al entry 1

First Known Use

1530, in the meaning defined at sense 1

Phrases Containing grammatical

• grammatical gender
• grammatical meaning

Rhymes for grammatical

• dogmatical
• fanatical
• sabbatical
• emblematical
• enigmatical
• kinematical
• mathematical
• problematical
• ungrammatical
• statical

Kids Definition

grammatical

adjective

gram·​mat·​i·​cal grə-ˈmat-i-kəl 

1

: of or relating to grammar

2

: conforming to the rules of grammar

a grammatical sentence

grammaticality

-ˌmat-ə-ˈkal-ət-ē 

noun

grammatically

-ˈmat-i-k(ə-)lē 

adverb

grammaticalness

-kəl-nəs 

noun