: 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
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Another great multifunctional choice, this GiveBest portable space heater delivers heat at both 1,500 watts or 750 watts, and works as a cold air fan.
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Julia Harrison, Architectural Digest, 27 Oct. 2025
Other features include a 100-Ah battery (a 300-Ah pack is also available) supported by a 120-watt solar panel, a Redarc battery management system, and a 120-liter fresh water tank.
—Bryan Hood, Robb Report, 24 Oct. 2025
Single-crystalline diamond also offers some of the highest thermal conductivity recorded in any material, reaching 2,200 to 2,400 watts per meter per kelvin—roughly six times as conductive as copper.
—IEEE Spectrum, 20 Oct. 2025
Top-line equipment options extend to the 1,800-watt, 21-speaker Mark Levinson audio system ($1,160).
—James Raia, Mercury News, 19 Oct. 2025
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Julia Harrison, Architectural Digest, 27 Oct. 2025
Other features include a 100-Ah battery (a 300-Ah pack is also available) supported by a 120-watt solar panel, a Redarc battery management system, and a 120-liter fresh water tank.
—Bryan Hood, Robb Report, 24 Oct. 2025
Single-crystalline diamond also offers some of the highest thermal conductivity recorded in any material, reaching 2,200 to 2,400 watts per meter per kelvin—roughly six times as conductive as copper.
—IEEE Spectrum, 20 Oct. 2025
Top-line equipment options extend to the 1,800-watt, 21-speaker Mark Levinson audio system ($1,160).
—James Raia, Mercury News, 19 Oct. 2025
See All Example Sentences for watt
Cite this Entry
“Watt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watt. Accessed 29 Oct. 2025.
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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