Pronunciation: (gram'ur),[key] —n. 1. the study of the way the sentences of a language are constructed; morphology and syntax.
2. these features or constructions themselves: English grammar. 3. an account of these features; a set of rules accounting for these constructions: a grammar of English. 4. Generative Gram.a device, as a body of rules, whose output is all of the sentences that are permissible in a given language, while excluding all those that are not permissible.
5. See prescriptive grammar. 6. knowledge or usage of the preferred or prescribed forms in speaking or writing: She said his grammar was terrible. 7. the elements of any science, art, or subject.
8. a book treating such elements.