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1
the physical and mental strength required for activity, work, etc.
- After studying all night, he had no energy left for the exam.
- After the concert, he was out of energy.
- I need a cup of coffee to boost my energy.
- She has so much energy, she's always running around.
- The kids expended their energy at the playground.
2
(physics) a source of power that is required to do any work that may exist in potential, kinetic, thermal and other forms
- The energy required to lift the box depends on its weight and the height it is lifted.
- Solar panels convert sunlight into electrical energy.
- Kinetic energy is highest when an object is at its maximum speed.
- Thermal energy is transferred from a hotter object to a cooler one.
- Chemical energy stored in batteries powers electronic devices.
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3
a source of power that can be used to produce heat, light, or to operate different machines
5
enterprising or ambitious drive
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6
an imaginative lively style (especially style of writing)
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7
the federal department responsible for maintaining a national energy policy of the United States; created in 1977
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