In literature, particularly in tragedy, a catastrophe refers to the final event or outcome that leads to the resolution of the plot and typically involves the downfall of the protagonist. This moment is crucial as it reveals the consequences of the character's actions and decisions, often culminating in death or ruin, thus eliciting a strong emotional response from the audience. In Shakespearean works, this event usually results from a combination of personal flaws and external forces, reinforcing themes of fate and human frailty.