Relating to or following the rules of grammar in a language. Something that conforms to the accepted structure and usage patterns of a language.
From Latin 'grammaticalis', derived from Greek 'grammatikos' meaning 'of letters or learning'. The root 'gramma' means 'letter' or 'something written'.
What's considered 'grammatical' varies significantly across languages and even dialects of the same language. Linguists distinguish between prescriptive grammar (rules taught in schools) and descriptive grammar (how people actually speak), leading to fascinating debates about 'correctness'.
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