what's the definition of grammar
For the rules of the English language, see English grammar. For other uses, see Grammar (disambiguation). In linguistics, grammar (From Greek: Î³ÏÎ±Î¼Î¼Î±ÏÎ¹ÎºÎ®) is the set of structural rules governing the composition of clauses, phrases, and words in any given natural language. The term refers also to the study of such rules, and this field includes morphology, syntax, and phonology, often complemented by phonetics, semantics, and pragmatics.