Page 544
Adjective
An adjective is a word used to describe a noun or pronoun.
Why did ancient dinosaurs become extinct?
Were they wiped out by the gigantic asteroid or the impact winter?
544.1 Articles
The articles a, an, and the are adjectives.
the diplodocus, a huge dinosaur, an animal
544.2 Proper Adjective
A proper adjective is formed from a proper noun, and it is always capitalized.