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Grammatical

From Teflpedia

Grammatical is an English adjective meaning “pertaining to grammar.” With copular be, this can refer to grammaticality or well-formedness and it has the antonym ungrammatical. Therefore, it may refer to either:

The adverb grammatically tends to refer to grammar and so redirects there.

Grammatical is ambiguous.
An appropriate Teflpedia entry may be listed above (🆘Help?!).