The document defines and describes adjective phrases. It begins by explaining that an adjective phrase is a group of words that serves to describe a noun or pronoun, functioning like an adjective. It then provides tips for identifying adjective phrases based on the first word. An adjective phrase can be made of an intensifier and adjective or multiple adjectives. The document offers examples of adjective phrases modifying nouns and pronouns. It also distinguishes adjective phrases from adjectival phrases, which may not contain an actual adjective. In conclusion, the document demonstrates how adjective phrases add descriptive power to writing through multiple examples.