: 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.
—
Julia Harrison, Architectural Digest, 23 Jan. 2026
Copper currently dominates the global heat-sink market, accounting for roughly 30% of commercial thermal-management materials, with a thermal conductivity of about 400 watts per meter-kelvin, according to a press release.
—Prabhat Ranjan Mishra, Interesting Engineering, 21 Jan. 2026
Other features included on the Staria Camper Concept include 520 watts of solar charging, an outdoor shower, a shore power hookup, and a passenger-side Fiamma awning.
—New Atlas, 18 Jan. 2026
Wilson’s smallest sub, the LōKē, uses a 10-inch woofer powered by a 500-watt amp, while its Subsonic relies on three 12-inch drivers that require outboard amplification.
—Robert Ross, Robb Report, 18 Jan. 2026
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Julia Harrison, Architectural Digest, 23 Jan. 2026
Copper currently dominates the global heat-sink market, accounting for roughly 30% of commercial thermal-management materials, with a thermal conductivity of about 400 watts per meter-kelvin, according to a press release.
—Prabhat Ranjan Mishra, Interesting Engineering, 21 Jan. 2026
Other features included on the Staria Camper Concept include 520 watts of solar charging, an outdoor shower, a shore power hookup, and a passenger-side Fiamma awning.
—New Atlas, 18 Jan. 2026
Wilson’s smallest sub, the LōKē, uses a 10-inch woofer powered by a 500-watt amp, while its Subsonic relies on three 12-inch drivers that require outboard amplification.
—Robert Ross, Robb Report, 18 Jan. 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 29 Jan. 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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