Active meaning

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”

tending to become more severe or wider in scope

“active tuberculosis”

engaged in or ready for military or naval operations

“on active duty”

“the platoon is combat-ready”

disposed to take action or effectuate change

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

“an active antagonism”

taking part in an activity

“an active member of the club”

“he was politically active”

characterized by energetic activity

“an active toddler”

“active as a gazelle”

exerting influence or producing a change or effect

“an active ingredient”

full of activity or engaged in continuous activity

“an active seaport”

“an active bond market”

in operation

“keep hope alive”

“the tradition was still alive”

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

expressing that the subject of the sentence has the semantic function of actor:

“Hemingway favors active constructions”

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

(of e.g. volcanos) capable of erupting

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

“active volcanos”

engaged in full-time work

“active duty”

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