joulePronunciation: /dʒuːl/ (abbreviation: J)Definition of joule noun the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one metre in the direction of action of the force, equivalent to one 3600th of a watt-hour. Origin: late 19th century: named after J. P. Joule (see Joule, James Prescott)joule in other Oxford dictionaries Definition of joule in the US English dictionary
