Energy - Definition

n 1: (physics) a thermodynamic quantity equivalent to 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" [syn: energy, free energy]
2: forceful exertion; "he plays tennis with great energy"; "he's
full of zip" [syn: energy, vigor, vigour, zip]
3: enterprising or ambitious drive; "Europeans often laugh at
American energy" [syn: energy, push, get-up-and-go]
4: an imaginative lively style (especially style of writing);
"his writing conveys great energy"; "a remarkable muscularity
of style" [syn: energy, muscularity, vigor, vigour,
vim]
5: a healthy capacity for vigorous activity; "jogging works off
my excess energy"; "he seemed full of vim and vigor" [syn:
energy, vim, vitality]
6: any source of usable power; "the DOE is responsible for
maintaining the energy policy"
7: the federal department responsible for maintaining a national
energy policy of the United States; created in 1977 [syn:
Department of Energy, Energy Department, Energy, DOE]