|Origin:||activus, from agere; ACT1|
always busy doing things, especially physical activities [≠ inactive]:
games for active youngsters
She's over 80, but is still very active.
My father always led a very active life.
a child with a very active imagination
involved in an organization or activity and doing lots of practical things to achieve your aims:
He became politically active at college.
be active in (doing) something
The Bureau is active in promoting overseas investment.
take/play an active part/role in something
Encourage students to take an active part in discussions.
She took an active interest in local charities.
the importance of active participation by elderly people in the life of the community
We're taking active steps (=doing practical things) to deal with the problem.
We maintain active links with other European universities.
operating in a way that is normal or expected [≠ inactive]:
The virus is active even at low temperatures.
doing something regularly:
sexually active teenagers
an active volcano is likely to explode at any time:
The volcano became active last year with a series of eruptions.
an active verb or sentence has the person or thing doing the action as its subject. In 'The boy kicked the ball', the verb 'kick' is active ➔ passive1 (2)
producing a chemical reaction:
nicotine, the active ingredient in tobacco
Carol was actively involved in the local sports club.