: 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
The human brain uses just 20 watts—less than a dim lightbulb.
—
Deni Ellis Béchard, Scientific American, 28 Mar. 2026
In Connecticut, an October law requires all e-bike riders to wear a helmet, and bikes without pedals equipped with batteries over 750 watts will require a driver's license.
—ABC News, 28 Mar. 2026
Plug-in, or 'balcony,' solar involves small, portable units, typically less than 390 watts, that can be connected directly to a standard wall outlet.
—Christiana Freitag, Chicago Tribune, 27 Mar. 2026
The legislation would allow customers to utilize plug-in solar panels with an output of up to 1,200 watts without the approval of their local electric utility — so long as the devices meet certain safety and consumer protection requirements.
—John Moritz, Hartford Courant, 25 Mar. 2026
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Deni Ellis Béchard, Scientific American, 28 Mar. 2026
In Connecticut, an October law requires all e-bike riders to wear a helmet, and bikes without pedals equipped with batteries over 750 watts will require a driver's license.
—ABC News, 28 Mar. 2026
Plug-in, or 'balcony,' solar involves small, portable units, typically less than 390 watts, that can be connected directly to a standard wall outlet.
—Christiana Freitag, Chicago Tribune, 27 Mar. 2026
The legislation would allow customers to utilize plug-in solar panels with an output of up to 1,200 watts without the approval of their local electric utility — so long as the devices meet certain safety and consumer protection requirements.
—John Moritz, Hartford Courant, 25 Mar. 2026
See All Example Sentences for watt
Cite this Entry
“Watt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watt. Accessed 31 Mar. 2026.
Copy CitationKids Definition
watt
noun
: 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
watt
noun
: 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
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