Define "antagonist".

The term "antagonist" refers to a character or force that opposes the protagonist, creating conflict in the story. This opposition is crucial for driving the plot forward and provides challenges that the protagonist must overcome. The antagonist's actions and motivations often serve to highlight the protagonist's qualities, making their journey more dynamic and engaging. This conflict can arise from various sources, including other characters, societal norms, or even internal struggles within the protagonist. Understanding the role of the antagonist is fundamental to grasping the structure of many stories, as it sets the stage for tension and development throughout the narrative.