active in WordNet English dictionary

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

1. (used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being
   active  dynamic 
   
2. characterized by energetic activity
   "an active toddler"; "active as a gazelle"; "an active man is a man of action"
   active 
   
3. tending to become more severe or wider in scope
   "active tuberculosis"
   active 
   
4. disposed to take action or effectuate change
   "a director who takes an active interest in corporate operations"; "an active antagonism"; "he was active in drawing attention to their grievances"
   active 
   
5. (of e.g. volcanos) erupting or liable to erupt
   "active volcanos"
   active 
   
6. (of e.g. volcanos) capable of erupting
   active 
   
7. full of activity or engaged in continuous activity
   "an active seaport"; "an active bond market"; "an active account"
   active 
   
8. exerting influence or producing a change or effect
   "an active ingredient"
   active 
   
9. engaged in full-time work
   "active duty"; "though past retirement age he is still active in his profession"
   active 
   
10. expressing that the subject of the sentence has the semantic function of actor: "Hemingway favors active constructions"
    active 
    
11. (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions
    active 
    
12. in operation
    "keep hope alive"; "the tradition was still alive"; "an active tradition"
    active  alive 
    
13. taking part in an activity
    "an active member of the club"; "he was politically active"; "the participating organizations"
    active  participating 
    
14. engaged in or ready for military or naval operations
    "on active duty"; "the platoon is combat-ready"; "review the fighting forces"
    active  combat-ready  fighting