GRAMMAR
Pronunciation: \ˈgra-mər\
Function: noun
1 a : the study of the classes of words, their inflections, and their functions and relations in the sentence
b : a study of what is to be preferred and what avoided in inflection and syntax
2 a : the characteristic system of inflections and syntax of a language
b : a system of rules that defines the grammatical structure of a language
3 : speech or writing evaluated according to its conformity to grammatical rules
4 : the principles or rules of an art, science, or technique <a grammar of the theater>; also : a set of such principles or rules