- noun an SI unit of measurement of electrical power, defined as power produced when one amp of current flows through a load that has one volt of voltage across it
- A unit of power equal to the power dissipated in an electric circuit in which a potential difference of 1 volt causes a current flow of 1 ampere. The power required to do work at the rate of 1 joule per second.
- The SI unit of power. It is equal to the power rate of one joule of work per second. In terms of mechanical power one watt equals approximately 0.001341022 horsepower. Electrically it is equal to the power produced by a current of one ampere flowing through a potential of one volt. Its symbol is W.
- noun a measure of the amount of power used by an appliance.
- noun an SI unit of measurement of electrical power. The work done by an electrical circuit or the power consumed is measured in watts.