A misdeed is a wrong or improper action, something that is considered wrong to do. When you commit a misdeed, you may have broken a rule, hurt someone, or acted in a way that isn’t right. The word covers everything from small wrongs, like swiping an extra cookie when you were told to take just one, to serious offenses like stealing or lying.

Often, what makes something a misdeed is that you know better. If you accidentally knock over a glass of milk, that’s just an accident. But if you deliberately hide your friend’s homework because you’re jealous of their good grades, that’s a misdeed: you chose to do something wrong.

Throughout history, people have faced consequences for their misdeeds. A student caught breaking the rules faces punishment from their teacher. A business owner who commits misdeeds might lose customers’ trust or face legal trouble. In stories and real life, characters often have to make amends for their past misdeeds by apologizing, making things right, or accepting appropriate consequences.

The word has an old-fashioned sound to it, which is why you might hear it in historical novels or formal writing. In everyday conversation, people might just say someone “did something wrong” or “messed up,” but misdeed captures the seriousness and intentional nature of the wrong action.