: 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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Buyers can upgrade off-grid readiness with up to 2,500 Wh of lithium battery power and 200 watts of solar charging. New Atlas, 11 July 2026 Zenno claims its cooling system is highly efficient, drawing only up to 48 watts at peak. Victor Tangermann, Futurism, 9 July 2026 The long-running Reference Series, comprised of preamplifiers, power amplifiers, DACs, and phono stages, has reached new heights with the Reference 330M monoblock power amplifier, capable of producing 330 watts from six KT170 output tubes. Justin Fenner, Robb Report, 8 July 2026 Thomas was driving a 750-watt pedaled e-bike, according to police. Matan Josephy, Idaho Statesman, 8 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 16 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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