1. (noun)energy, free energy (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs Synonyms: vim, vitality, vigour, push, zip, muscularity, freeenergy, vigor, energy, get-up-and-go
7. (noun)Department of Energy, Energy Department, Energy, DOE the federal department responsible for maintaining a national energy policy of the United States; created in 1977 Synonyms: vim, vitality, vigour, push, zip, muscularity, freeenergy, vigor, get-up-and-go