Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “energy”


noun [U]
the power from something such as electricity or oil, which can do work, such as providing light and heat: use/consume/waste energy 80% of the energy used to wash garments is needed to heat the energy We aim to manage and conserve energy and water efficiently within all our premises.provide/produce/generate energy These power stations work 24 hours a day, providing energy to the nation. energy use/costs energy supply/production wind/wave/solar energy → See also eco-energy, green energy, non-renewable energy, renewable energy, sustainable energy
(Definition of energy from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of energy?
Add Cambridge dictionaries to your browser to your website

Definitions of “energy” in other dictionaries

Word of the Day


to throw or drop something carelessly

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More