\ ˈwät How to pronounce watt (audio) \

Definition of watt

 (Entry 1 of 2)

: 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


biographical name
\ ˈwät How to pronounce Watt (audio) \

Definition of Watt (Entry 2 of 2)

James 1736–1819 Scottish inventor

Examples of watt in a Sentence

Recent Examples on the Web: Noun

Using my values, the one turn of the wind turbine creates 291 watt-hours (a unit of energy) but a house uses about 48 thousand watt-hours. Rhett Allain, WIRED, "Estimate the Energy of an Utterly Massive Wind Turbine," 13 June 2019 The Unicorn has a maximum speed of 15 mph, a range of 10-15 miles, a 300 watt motor, and a 187 WH battery that takes 3.5 hours to charge. Andrew J. Hawkins, The Verge, "Unicorn is a $699 electric scooter from the co-creator of Tile," 20 June 2019 Muscles can generate approximately 100 to 300 watts per kilogram of power (power is the amount of energy transferred per unit of time). Quanta Magazine, "Too Small for Big Muscles, Tiny Animals Use Springs," 13 June 2018 The chip is rated to dissipate up to 15 watts of thermals and has a base clock of 2.3GHz and 4GHz boost frequencies. Gordon Mah Ung, PCWorld, "Lenovo puts AMD Ryzen chips in ThinkPads, giving Intel's rival a boost," 8 May 2019 Grace Elizabeth is down right angelic, with her high, prominent cheekbones and mega-watt smile which has brought her not only commercial success but prominence in the world of high fashion. Chrissy Rutherford, Harper's BAZAAR, "Exclusive: Grace Elizabeth Is Now a Victoria's Secret Angel," 10 Apr. 2019 Conway’s formula: 16 Lumens equals 1 incandescent watt. Kathryn O’shea-evans, WSJ, "Goodbye, Showy Chandeliers. Hello, Low-Key Lighting That Transforms Rooms," 25 Jan. 2019 Dreamed up by costume designer Karen Patch, the dress provides a shock of high-watt fabulousness—enough to jolt anyone into a more desirable state. Vogue, "13 Perfect Rom-Coms to Help With Your Holiday Hangover Right Now," 1 Jan. 2019 At a high level, government and private R&D spending contributed the most to cost-per-watt declines for solar panels since 1980. Megan Geuss, Ars Technica, "How the falling cost of solar panels can teach us to make new tech affordable," 26 Nov. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'watt.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of watt


1882, in the meaning defined above

History and Etymology for watt


James Watt †1819

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Statistics for watt

Last Updated

11 Jul 2019

Look-up Popularity

Time Traveler for watt

The first known use of watt was in 1882

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English Language Learners Definition of watt

: a unit for measuring electrical power


\ ˈwät How to pronounce watt (audio) \

Kids Definition of watt

: a unit for measuring electric power


\ ˈwät How to pronounce watt (audio) \

Medical Definition of watt

: 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

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Rhyming Dictionary: Words that rhyme with watt

Spanish Central: Translation of watt

Nglish: Translation of watt for Spanish Speakers

Britannica English: Translation of watt for Arabic Speakers

Britannica.com: Encyclopedia article about watt

Comments on watt

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