Evil describes actions, people, or forces that cause serious harm on purpose, without care for others' suffering. When someone commits an evil act, they choose to hurt others in ways that most people would find deeply wrong, going far beyond mistakes or momentary anger.

Throughout history, people have called acts evil when they involve cruelty, violence, or causing suffering for selfish reasons or for no good reason at all. A villain in a story might have evil plans to harm innocent people. In real life, criminals who hurt others without remorse are often described as evil.

The word carries serious weight. We might say a friend acted mean or unfair, but we reserve evil for something much worse: deliberate harm without conscience. Evil isn't about small wrongs like forgetting to return a borrowed pencil. It describes grave wrongdoing, the kind that makes people feel unsafe or causes lasting damage.

Stories often explore the battle between good and evil, showing heroes who stand up against villains. These tales help us think about right and wrong, courage and cowardice. While evil exists in the world, so does goodness: people who protect others, stand up for what's right, and choose kindness even when it's difficult.

As a noun, evil means the harmful force, behavior, or wrongdoing itself, as in “the fight against evil.”