The noun active has 3 senses (first 1 from tagged texts)
1. (16) active agent, active -- (chemical agent capable of activity)
2. active voice, active -- (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. active -- (a person devoted to the active life)
Overview of adj active
The adj active has 14 senses (first 8 from tagged texts)
1. (9) active -- (tending to become more severe or wider in scope; "active tuberculosis")
2. (7) active, combat-ready, fighting -- (engaged in or ready for military or naval operations; "on active duty"; "the platoon is combat-ready"; "review the fighting forces")
3. (5) active -- (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")
4. (4) active, participating -- (taking part in an activity; "an active member of the club"; "he was politically active"; "the participating organizations")
5. (3) active -- (characterized by energetic activity; "an active toddler"; "active as a gazelle"; "an active man is a man of action")
6. (2) active -- (exerting influence or producing a change or effect; "an active ingredient")
7. (2) active -- (full of activity or engaged in continuous activity; "an active seaport"; "an active bond market"; "an active account")
8. (1) active, alive -- (in operation; "keep hope alive"; "the tradition was still alive"; "an active tradition")
9. active -- (of the sun; characterized by a high level activity in sunspots and flares and radio emissions)
10. active -- (expressing that the subject of the sentence has the semantic function of actor: "Hemingway favors active constructions")
11. active, dynamic -- (expressing action rather than a state of being; used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water'))
12. active -- ((of e.g. volcanos) capable of erupting)
13. active -- ((of e.g. volcanos) erupting or liable to erupt; "active volcanos")
14. active -- (engaged in full-time work; "active duty"; "though past retirement age he is still active in his profession")