Zap is a verb that means to quickly and suddenly strike or hit something or someone with a burst of energy or force. It can also refer to the act of using electricity to shock or stun, often used in the context of self-defense or pest control. Additionally, zap can describe the action of instantly erasing or removing something, such as a computer file or a stain on clothing. In slang terms, zap can also mean to move or travel at a high speed, as in “zapping through traffic.” Overall, zap conveys a sense of swift and powerful action, often with a touch of surprise or intensity.