active /ˈæktɪv/ adjective
INVOLVED › very involved in an organization or planned activity: an active member of the church He played an active role in the campaign.
BUSY › doing a lot of things, or moving around a lot: Even at the age of 80 she's still very active.
GRAMMAR › An active verb or sentence is one in which the subject of the verb is the person or thing doing the action. For example 'Andy drove the car.' is an active sentence. → Compare passive adjective
VOLCANO › An active volcano could throw out rocks, fire, etc at any time.