energy ( energies plural )
1 n-uncount Energy is the ability and strength to do active physical things and the feeling that you are full of physical power and life.
He was saving his energy for next week's race in Belgium...
2 n-uncount Energy is determination and enthusiasm about doing things., (approval)
You have drive and energy for those things you are interested in.
3 n-count Your energies are your efforts and attention, which you can direct towards a particular aim.
usu pl, poss N
She had started to devote her energies to teaching rather than performing...
4 n-uncount Energy is the power from sources such as electricity and coal that makes machines work or provides heat. oft N n ...those who favour nuclear energy..., Oil shortages have brought on an energy crisis...
energy-efficient , energy efficient
A device or building that is energy-efficient uses relatively little energy to provide the power it needs. adj
...energy-efficient light bulbs., ...information on how to make your home more energy efficient.
In physics, kinetic energy is the energy that is produced when something moves. (TECHNICAL) n-uncount
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