A crime is an action that breaks a law and can result in punishment by the government. When someone commits a crime, they've done something that society has decided is serious enough to forbid and penalize. Stealing a bicycle is a crime. So is breaking into a house, setting a dangerous fire, or hurting someone on purpose.

Not every wrong action is a crime, though. If you break a promise to a friend or cut in line at school, those things might be rude or unfair, but they're not crimes because no law forbids them. Crimes are specifically the acts that governments write laws against, like theft, assault, vandalism, or fraud.

Different crimes carry different punishments depending on how serious they are. Minor crimes might result in fines or community service, while serious crimes can lead to years in prison. The word criminal describes both a person who commits crimes and things related to crime itself: criminal behavior, criminal courts, or criminal investigations.

Societies create laws and define crimes to protect people and property, maintain order, and ensure everyone can live safely together. What counts as a crime can vary between countries or even between states or provinces. Some places might have laws against certain actions that other places allow. But the core idea stays the same: crimes are the specific wrongs that break written laws and bring legal consequences.