*en·er·gy/`ɛnədʒɪ; ˈenədʒi/ n [C,U] 1 the ability to do a lot of work or activities without feeling tired 活力，干劲: She came back from her trip full of energy and enthusiasm. 她旅行回来，浑身充满着活力和热忱。 2 power from oil, coal etc that produces heat and makes machines work 能，能量，能源: atomic energy 原子能