Active

Active may mean:

active lifestyle
active volcano
Sky Active, Sky's Interactive Service
active grammatical voice
Active electronics are components, circuits or units of equipment that consume power other than the signal itself, most normally to provide amplification. See active component.
in any sexual activity involving penetration, active refers to the penetrating party, and passive to the receiving one
in a fraternity or sorority, a member currently enrolled in school and actively participating with the organization (in this case, "active" is used as a noun)

See also