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English definition of “energy”

energy

noun uk   /ˈen.ə.dʒi/ us    /-ɚ-/

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).Excitement, interest, energy and 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.Excitement, interest, energy and enthusiasm

energy noun (POWER)

B1 the power from something such as electricity or oil, which can do work, such as providing light and heat: The energy generated by the windmill drives all the drainage pumps. energy conservation/efficiency. nuclear energyEnergy, force and powerPower and intensity
(Definition of energy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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