Definition of “energy” - English Dictionary

“energy” in British English

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uk /ˈen.ə.dʒi/ us /ˈen.ɚ.dʒi/

energy noun (STRENGTH)

B1 [ U ] the power and ability to be physically and mentally active:

Since I started eating more healthily I've got so much more energy.
I was going to go out this evening, but I just haven't got the energy.
[ + to infinitive ] I didn't even have the energy to get out of bed.
approving Her writing is full of passion and energy (= enthusiasm).
energies [ plural ]

the total of all your power and ability to be mentally and physically active:

I'm going to channel all my energies into getting a better job.

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(Definition of “energy” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“energy” in American English

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us /ˈen·ər·dʒi/

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)

“energy” in Business English

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energynoun [ 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 water.
save/conserve 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
wind/wave/solar energy

(Definition of “energy” from the Cambridge Business English Dictionary © Cambridge University Press)