grammar

noun

• the whole system and structure of a language or of languages in general, usually taken as consisting of syntax and morphology (including inflections) and sometimes also phonology and semantics.
• [usually with modifier] a particular analysis of the system and structure of language or of a specific language.
• a book on grammar:my old Latin grammar
• a set of actual or presumed prescriptive notions about correct use of a language:it was not bad grammar, just dialect
• the basic elements of an area of knowledge or skill:the grammar of wine
• Computing a set of rules governing what strings are valid or allowable in a language or text.