Definition of "grammar" []

• The study of how words and their component parts combine to form sentences. (noun)
• The study of structural relationships in language or in a language, sometimes including pronunciation, meaning, and linguistic history. (noun)
• The system of inflections, syntax, and word formation of a language. (noun)
• The system of rules implicit in a language, viewed as a mechanism for generating all sentences possible in that language. (noun)
• A normative or prescriptive set of rules setting forth the current standard of usage for pedagogical or reference purposes. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "An adjective, in grammar, is a word whose main syntactic role is to modify a noun or pronoun (called the adjective's head), giving more information about to what the noun or pronoun refers."
• "The creation of sentences requires the last step in language development, the incorporation of rules in the form of what we call grammar."
• ""Glamour," surprisingly, is derived from a medieval sense of the Latin word "grammar" to mean "scholarship, especially occult learning.""