The definition of energetic is full of action or energy.(adjective)
An example of energetic is a person who works at full speed for 12 hours a day.
See energetic in Webster's New World College Dictionary
Origin: Gr energētikos
See energetic in American Heritage Dictionary 4
Origin: Greek energētikos
Origin: , from energein, to be active
Origin: , from energos, active; see energy.
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