n (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
n forceful exertion
he plays tennis with great energy
n enterprising or ambitious drive
Europeans often laugh at American energy
n an imaginative lively style (especially style of writing)
his writing conveys great energy
n a healthy capacity for vigorous activity
jogging works off my excess energy
n any source of usable power
the DOE is responsible for maintaining the energy policy
n the federal department responsible for maintaining a national energy policy of the United States; created in 1977