Corruption is dishonest or illegal behavior by people in positions of power or trust, especially when they abuse their authority for personal gain. When a government official accepts bribes to give special favors, when a police officer looks the other way in exchange for money, or when a judge makes decisions based on who pays them rather than what's right, that's corruption.

Corruption breaks something important: it destroys trust in systems that are supposed to work fairly for everyone. When corruption spreads through a government or organization, people lose faith that rules apply equally or that hard work and honesty matter.

Corruption can be small or large. A teacher who changes grades for students who bring gifts is engaging in corruption. A mayor who steers city contracts to friends and family members instead of the best-qualified companies is corrupt. Countries with widespread corruption often struggle because people spend more energy working around unfair systems than building and creating.

The word also describes physical decay or rot, like when food becomes corrupted by bacteria. In computer terms, corrupted files are damaged and no longer work properly. All these meanings share the idea of something once good or whole being broken or spoiled.