joule
nounUK /dʒuːl/
US /dʒuːl/
A joule is a unit that measures how much energy something has or uses.
Lifting an apple about one meter takes roughly one joule of energy.
RELATED WORDS
OTHER MEANINGS
2. The SI unit of work or energy, equal to the work done by a force of one newton acting through one meter.
The machine does 500 joules of work each second.
3. A unit used to measure the energy value of food or the heat produced in a reaction.
The chemist measured the heat released in joules.
4. A unit of electrical energy equal to the energy dissipated by one ampere through one ohm for one second.
The resistor released several joules of heat.