active

adjective

1
characterized by energetic activity
an active toddler
active as a gazelle
2
engaged in full-time work
active duty
though past retirement age he is still active in his profession
3
full of activity or engaged in continuous activity
an active seaport
an active bond market
4
tending to become more severe or wider in scope
active tuberculosis
5
disposed to take action or effectuate change
a director who takes an active interest in corporate operations
an active antagonism
6
(of e.g. volcanos) erupting or liable to erupt
active volcanos
7
(of e.g. volcanos) capable of erupting
8
(used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being
9
expressing that the subject of the sentence has the semantic function of actor: "Hemingway favors active constructions"

1
a person who is a participating member of an organization
the club issues a list of members, both the actives and the retirees
2
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
3
chemical agent capable of activity

Also useful for “active”:Scrabble— High-value letters — see what it scores