The study of how words and their component parts combine to form sentences. The study of structural relationships in language or in a language, sometimes including pronunciation, meaning, and linguistic history. The system of inflections, syntax, and word formation of a language. The system of rules implicit in a language, viewed as a mechanism for generating all sentences possible in that language. A normative or prescriptive set of rules setting forth the current standard of usage for pedagogical or reference purposes. Writing or speech judged with regard to such a set of rules. A book containing the morphologic, syntactic, and semantic rules for a specific language. The basic principles of an area of knowledge: the grammar of music. A book dealing with such principles.