- possessing or exhibiting energy, especially in abundance; vigorous: an energetic leader.
- powerful in action or effect; effective: to take energetic measures against crime.
- having or showing much energy or force; vigorous
1650s, “powerful,” from Greek energetikos “active,” from energein “to work, act upon” (see energy). Of persons, “active,” in English from 1796 (energetical is from c.1600).