\ ˈjül How to pronounce joule (audio) also nonstandard ˈjau̇(-ə)l How to pronounce joule (audio) \

Definition of joule

 (Entry 1 of 2)

: a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter


biographical name
\ ˈjül How to pronounce Joule (audio) \

Definition of Joule (Entry 2 of 2)

James Prescott 1818–1889 English physicist

Examples of joule in a Sentence

Recent Examples on the Web: Noun So that gives you a rough feeling for the amount of energy in a joule. Rhett Allain, Wired, 13 Apr. 2021 Not 17 times as much energy, but 172 times more, or 2.8 x 1013 joules. Rhett Allain, Wired, 26 May 2020 Those include firearms with a gun barrel diameter of more than 20 mm and weapons with a muzzle energy of more than 10,000 joules. Zachary Halaschak, Washington Examiner, 30 Apr. 2020 There were no standard units of electricity back then, but modern estimates indicate that a pint-sized Leyden jar would have had the energy of about 1 joule. Jennifer Ouellette, Ars Technica, 28 Nov. 2019 The lead pair of reindeer will absorb 14.3 QUINTILLION joules of energy. Kyle Mizokami, Popular Mechanics, 23 Dec. 2019 Goff estimates the kinetic energy, or energy that results via any form of motion, from a 100-mph line drive to be about 145 joules. Neil Greenberg,, 5 June 2019 The current binding energy of Earth is 2.24 x 10^32 joules. Sophie Weiner, Popular Mechanics, 13 Aug. 2017 Bridge crossers could generate about 170 million joules per day, which could run 65 laptops or more than 600 tablets for a day, keep a desktop computer running for three weeks straight or fully charge 5,000 smartphones. Terry Gardner,, 20 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'joule.' 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 joule


1882, in the meaning defined above

History and Etymology for joule


James P. Joule

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Cite this Entry

“Joule.” Dictionary, Merriam-Webster, Accessed 22 Jun. 2021.

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More Definitions for joule



English Language Learners Definition of joule

physics : a unit of work or energy


\ ˈjü(ə)l How to pronounce joule (audio) \

Medical Definition of joule

: a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter

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