Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “energy”

energy

noun  /ˈen·ər·dʒi/ us  

energy noun (STRENGTH)

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.

energy noun (POWER)

physics [U] power to do work that produces light, heat, or motion, or the fuel or electricity used for power: Certain materials acquired the ability to carry an electric charge with no loss of energy. The cost of energy rose last month.
(Definition of energy from the Cambridge Academic Content 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

look on the bright side

to find good things in a bad situation

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More