1. Abbreviated as W, a watt is a unit of electrical power equaling the product of amperage and voltage, and represents the amount of power a device requires to operate. Common measurements are kilowatt (1,000 watts), megawatt (1 million watts), microwatt (.000001 watt), and milliwatt (.001 watt).
2. Watt is also used with the description of speakers to describe the amount of amplification available for the speakers.