Entry Word: energy

Function: noun

Meaning: 1 active strength of body or mind <for a woman of advanced years, she has remarkable energy> — see vigor 1
2 something with a usable capacity for doing work <some of the power needs of the house are provided by solar energy> — see fuel
3 the ability to exert effort for the accomplishment of a task <Iʼm so tired that I donʼt think I have the energy to take another step> — see power 2