Definitions
1.nounA system of rules and principles for speaking and writing a language.
2.nounThe study of the internal structure of words (morphology) and the use of words in the construction of phrases and sentences (syntax).
3.nounA book describing the rules of grammar of a language.
4.nounA formal system specifying the syntax of a language.
5.nounActual or presumed prescriptive notions about the correct use of a language.
6.nounA formal system defining a formal language
7.nounThe basic rules or principles of a field of knowledge or a particular skill.
8.nounA textbook."a grammar of geography"
9.nounA grammar school."2012, Graeme Paton, A green light for more grammars? (in The Daily Telegraph, 11 January 2012)"
10.verbTo discourse according to the rules of grammar; to use grammar.