Definition of energetic adjective from the Oxford Advanced Learner's Dictionary

  

energetic

 adjective
adjective
BrE BrE//ˌenəˈdʒetɪk//
 
; NAmE NAmE//ˌenərˈdʒetɪk//
 
Energetic
 
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having or needing a lot of energy and enthusiasm He knew I was energetic and dynamic and would get things done. an energetic supporter The heart responds well to energetic exercise. For the more energetic (= people who prefer physical activities), we offer windsurfing and diving. I think I'd prefer something a little less energetic. See related entries: Energetic Word Origin mid 17th cent. (in the sense ‘powerfully effective’): from Greek energētikos, from energein ‘operate, work in or upon’ (based on ergon ‘work’).Extra examples Quasars are the highly energetic cores of distant galaxies. She seems remarkably energetic for a woman her age. For the more energetic we offer windsurfing and diving. He knew I was energetic and would get things done. I think I’d prefer something a little less energetic.
See the Oxford Advanced American Dictionary entry: energetic