To undo; to disfigure; to destroy.
- To win victory over; beat.
- To prevent the success of; thwart: Internal strife defeats the purpose of teamwork.
- Law To make void; annul.
- The act of defeating or state of being defeated.
- Failure to win.
- A coming to naught; frustration: the defeat of a lifelong dream.
- Law The act of making null and void.