Noun:
1: energy (physics) the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms"
2: energy, vigor, zip, vigour forceful exertion; "he plays tennis with great energy"; "he's full of zip"
3: push, energy, get-up-and-go enterprising or ambitious drive; "Europeans often laugh at American energy"
4: vim, vigor, vigour, energy, muscularity an imaginative lively style (especially style of writing); "his writing conveys great energy"; "a remarkable muscularity of style"
5: vitality, vim, energy a healthy capacity for vigorous activity; "jogging works off my excess energy"; "he seemed full of vim and vigor"
6: doe, energy, department of energy, energy department the federal department responsible for maintaining a national energy policy of the United States; created in 1977