active

Engaged in or ready for military or naval operations.

“on active duty”

Engaged in full-time work.

“active duty”

“though past retirement age he is still active in his profession”

Exerting influence or producing a change or effect.

“an active ingredient”

Expressing that the subject of the sentence has the semantic function of actor:.

“Hemingway favors active constructions”

Full of activity or engaged in continuous activity.

“an active seaport”

“an active bond market”

(of e.g. volcanos) capable of erupting.

(of e.g. volcanos) erupting or liable to erupt.

“active volcanos”

(of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions.

Tending to become more severe or wider in scope.

“active tuberculosis”

(used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being.

Taking part in an activity.

“an active member of the club”

“he was politically active”

In operation.

“an active tradition”

Characterized by energetic activity.

“an active toddler”

“active as a gazelle”

Disposed to take action or effectuate change.

“a director who takes an active interest in corporate operations”

“an active antagonism”

Chemical agent capable of activity.

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”

A person who is a participating member of an organization.

“the club issues a list of members, both the actives and the retirees”