: 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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Electric bicycles, in contrast, come with pedals and an electric motor that does not exceed 750 watts, according to the California Highway Patrol. — ABC News, 22 Oct. 2026 The company said pricing is now tracking above the $30-$50/watt range given by Musk at Q2. — Liz Napolitano, CNBC, 21 Oct. 2026 But while in Illinois, the best Louise could do for publicity was a Saturday interview on a low-watt AM station, and a couple of meetings with high school newspapers. — Christopher Borrelli, Chicago Tribune, 18 Oct. 2026 Their peak intensity exceeded 1020 watts per square centimeter. — Rupendra Brahambhatt, Interesting Engineering, 17 Oct. 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 25 Oct. 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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