: the absolute meter-kilogram-second unit of power equal to the work done at the rate of one joule per second or to the power produced by a current of one ampere across a potential difference of one volt : 1/746 horsepower

Examples of watt in a Sentence

Recent Examples on the Web
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The unit is configured for a 28-watt TDP, and the Ventiva modules are housed in a strip across the back edge of the laptop, venting out the rear. John Burek, PC Magazine, 5 July 2026 The Elora electrical system is built atop a 5-kWh EcoFlow battery hooked up to EcoFLow's 5-in-1 PowerHub with inverter and 200 watts of solar charging. New Atlas, 3 July 2026 Police noted that the e-bike was a 750-watt electric bicycle with pedals. Rose Evans, Idaho Statesman, 3 July 2026 The platform is designed to operate at 800-volt DC, the same voltage as GPU racks, ensuring less waste and maximizing compute per watt. Ameya Paleja, Interesting Engineering, 3 July 2026 See All Example Sentences for watt

Word History

Etymology

James Watt †1819

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of watt was in 1882

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Cite this Entry

“Watt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watt. Accessed 10 Jul. 2026.

Kids Definition

: a unit of power equal to the work done at the rate of one joule per second
Etymology

named for James Watt 1736–1819 Scottish engineer

Medical Definition

: the absolute mks unit of power equal to the work done at the rate of one joule per second or to the power produced by a current of one ampere across a potential difference of one volt : ¹/₇₄₆ horsepower

Biographical Definition

James 1736–1819 Scottish inventor

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