Rocinante is the name of the horse belonging to Don Quixote, the main character in the novel "Don Quixote" written by Miguel de Cervantes. The horse is described as a former workhorse, now old and worn, yet it symbolizes the idealism and dreams of its owner. In the story, Rocinante accompanies Don Quixote on his adventures as he seeks to revive chivalry and fight for justice. Despite its humble appearance, the horse represents loyalty and serves as a faithful companion throughout Don Quixote's quests.