A "tragic flaw" is a character trait that leads to the downfall of a hero in a story. This flaw often stems from a person's strengths, such as pride or ambition, which can become excessive. For example, in Shakespeare's play Macbeth, the main character's ambition drives him to commit terrible acts, ultimately leading to his demise. In literature, the tragic flaw serves as a reminder of human vulnerability. It shows that even the greatest heroes can make mistakes due to their imperfections. This concept is not just limited to plays; it can be found in many stories, highlighting the complexity of human nature.