- The definition of a watt is the basic unit of electric, mechanical or thermal power.
An example of a watt is a measure of a light bulb's power.

## watt

noun

*W*

Origin of watt

after James Watt: name proposed (1882) by Sir William Siemens

## watt

noun

*Abbr.*

**W**

*Electricity*

Origin of watt

After James**Watt**.

## watt

(*plural* watts)

- In the International System of Units, the derived unit of power; the power of a system in which one joule of energy is transferred per second. Symbol: W

Named after the Scottish engineer James Watt.

- An English and Scottish surname derived from the given name Wat.

## watt - Computer Definition

Watt is the fundamental unit of electrical power, and is a rate unit, rather than a quantity.The wattage is determined by multiplying the voltage (E), as measured in volts (V), by the current (I), as measured in amperes (A). (W = V

The standard unit of measurement of electrical power. One watt is one ampere of current flowing at one volt. Watts are typically rated as AMPS x VOLTS or VOLT-AMP (V-A). However, this rating is only equivalent to watts when it applies to devices that absorb all the energy, such as electric heating coils or incandescent light bulbs. With computer power supplies, the actual watt rating is only 60% to 70% of the VOLT-AMP rating.