What is the meaning of Grammar?

A system of rules and principles for the structure of a language, or of languages in general.

1. The study of such a system.

The study of such a system.

Actual or presumed prescriptive notions about the correct use of a language.

A book describing the grammar (sense 1 or sense 2) of a language.

(Can we verify this sense?) A formal system specifying the syntax of a language.

A formal system defining a formal language.

The basic rules or principles of a field of knowledge or a particular skill.

A book describing these rules or principles; a textbook.

Ellipsis of grammar school.

A set of component patterns, along with the rules for connecting them, which can be combined to form more complex patterns such as large still lifes, oscillators, and spaceships.

To discourse according to the rules of grammar; to use grammar.

Source: wiktionary.org