GRAM'MAR, n. [L. grammatica; Gr. a letter, to write.]

1. In practice, the art of speaking or writing a language with propriety or correctness, according to established usage.

As a science, grammar treats of the natural connection between ideas and words, and develops the principles which are common to all languages.

2. A system of general principles and of particular rules for speaking or writing a language; or digested compilation of customary forms of speech in a nation; also, a book containing such principles and rules.

3. Propriety of speech. To write grammar, we must write according to the practice of good writers and speakers.

GRAM'MAR, v.i. To discourse according to the rules of grammar.

GRAM'MAR, a. Belonging to or contained in grammar; as a grammar rule.