Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “energy”

energy

noun (STRENGTH)   /ˈen·ər·dʒi/
the power and ability to be physically and mentally active: [U] They spent a lot of time and energy on the grant proposal. [U] He wrote with a great burst of energy. Your energies are the total amount of your physical and mental strength to do something: [pl] All my energies were directed toward establishing an academic career.
(Definition of energy noun (STRENGTH) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of energy

Definitions of “energy” in other dictionaries

Word of the Day

pump iron

to lift heavy weights for exercise

Word of the Day

Blog

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