What do you mean by grammar.

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 is known as grammar.

hope this helps.

THE BACKBONE OF A LANGUAGE

Definition of grammar
1
A:  the study of the classes of words, their inflections (see infection 3), and their functions and relations in the sentence
B:  a study of what is to be preferred and what avoided in infection (see infection 3) and syntax (see syntax 1)
2
A:  the characteristic system of infections (see infection 3) and syntax of a language
B:  a system of rules that defines the grammatical structure of a language
3
A:  a grammar textbook
B:  speech or writing evaluated according to its conformity to grammatical rules appalled at the bad grammar of college students
4
:  the principles or rules of an art, science, or technique a grammar of the theatre; also:  a set of such principles or rules