: 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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The console, which is finished in natural walnut, also features a pair of two-way bass-reflex speakers powered by a 100-watt per channel Class D amplifier.
—
Bryan Hood, Robb Report, 16 May 2026
Power for deep space The Next Gen RTG produces roughly 250 watts of electricity at the start of its operational life.
—Aamir Khollam, Interesting Engineering, 15 May 2026
Its 55 air watts of suction is far less than most cordless models, but is more than enough for hard floors.
—The Week Uk, TheWeek, 14 May 2026
Bikes that do not use pedals, have more than 750 watts of power, or can reach speeds higher than 28 mph are considered electric motorcycles.
—Los Angeles Times, 12 May 2026
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Bryan Hood, Robb Report, 16 May 2026
Power for deep space The Next Gen RTG produces roughly 250 watts of electricity at the start of its operational life.
—Aamir Khollam, Interesting Engineering, 15 May 2026
Its 55 air watts of suction is far less than most cordless models, but is more than enough for hard floors.
—The Week Uk, TheWeek, 14 May 2026
Bikes that do not use pedals, have more than 750 watts of power, or can reach speeds higher than 28 mph are considered electric motorcycles.
—Los Angeles Times, 12 May 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 21 May. 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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