Engaged in action; characterized by energetic work, participation, or movement. She is an active member of the community, always volunteering for events.
Involving physical movement and exertion. He leads an active lifestyle, going for a run every morning.
Currently in operation or use. The active volcano poses a threat to nearby villages.
Having a chemical or biological effect. The active ingredient in the medication helps reduce inflammation.
Participating or ready to participate in a particular sphere or activity. She is active in the political scene, often attending rallies and debates.
Of a verb or voice: expressing that the subject of the clause performs the action. In the sentence "Birds build nests," the verb "build" is active.
(Electronics) Requiring an external power source to operate and capable of amplification, switching, or signal control, as opposed to passive. The circuit employs active components such as transistors and operational amplifiers.