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Definition of joule

joule

/dʒuːl/
joule
Plural:joules
•
Adjective:joulean
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joule Lexical Profile

joule Game Scores & Validity

• noun

1

The standard unit of work or energy in the International System of Units (SI), equal to the work done by a force of one newton acting through a distance of one meter.

Example

"Raising the temperature of one gram of water by one degree Celsius requires approximately 4.184 joules of heat energy."

Word Nuance & Usage

Do not confuse 'joule' (a unit of energy) with its homophone 'jewel' (a precious stone).

• Rhymes for joule

• Nearby Words

jot
jotter
jotting
joule
journal
journaling
journalism

Word Origin & Etymology

Coined in the late 19th century as a physics unit of measurement, named in honor of the English physicist James Prescott Joule (1818–1889), who established the mechanical equivalent of heat.

Cite this Entry

Wordmom. (2026). Definition of Joule. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/joule
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