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energy, free energy | [in physics] a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs | |
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energy | any source of usable power | |
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energy, push, get-up-and-go | enterprising or ambitious drive | |
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Department of Energy, Energy Department, Energy, DOE | the federal department responsible for maintaining a national energy policy of the United States; created in 1977 | |
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energy, muscularity, vigor, vigour, vim | an imaginative lively style (especially style of writing) | |
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vitality, energy, vim | a healthy capacity for vigorous activity | |
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energy, vigor, zip, vigour | forceful exertion |