1.Definition: a person who is a participating member of an organization

"The club issues a list of members, both the actives and the retirees"

Category: People

2.Definition: chemical agent capable of activity

Category: General

3.Definition: the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb

"`The boy threw the ball' uses the active voice"

Category: General