ACTIVE

adj. 1 strenuous, vigorous, full, dynamic, physical; energetic, lively, busy, brisk, bustling, occupied, on the move, Colloq on the go, running She is healthier for having led a very active life He always seems to be active. 2 acting, effective, efficacious, effectual, working, functioning, operative, potent, influential; powerful The active ingredient in her medicine is an antihistamine 3 energetic, lively, hyperactive, animated, spry, nimble, quick, agile, sprightly There is no keeping up with an active child