This document defines and provides examples of several key literary terms: 1) It discusses poetics as the theoretical study of literary principles, imagination as the ability to form new images without perception, and catharsis as the concept of purgation through dramatic art. 2) Tragedy is defined as a dramatic presentation of serious action that follows the principles of unity, and examples of tragedies by Shakespeare and Marlowe are provided. 3) The plot is described as having an exposition, climax, and denouement.