What does active mean?
The definition of active
Ac”tive, a.
Etym: [F. actif, L. activus, fr. agere to act.]

1 Having the power or quality of acting; causing change; communicating action or motion; acting; — opposed to Ant: passive, that receives; as, certain active principles; the powers of the mind.
2 Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal. Active and nervous was his gait. Wordsworth.
3 In action; actually proceeding; working; in force; — opposed to quiescent, dormant, or extinct; as, active laws; active hostilities; an active volcano.
4 Given to action; constantly engaged in action; energetic; diligent; busy; — opposed to dull, sluggish, indolent, or inert; as, an active man of business; active mind; active zeal.
5 Requiring or implying action or exertion; — opposed to Ant: sedentary or to Ant: tranquil; as, active employment or service; active scenes.
6 Given to action rather than contemplation; practical; operative; – – opposed to Ant: speculative or Ant: theoretical; as, an active rather than a speculative statesman.
7 Brisk; lively; as, an active demand for corn.
8 Implying or producing rapid action; as, an active disease; an active remedy.
9 (Gram.)

(a) Applied to a form of the verb; — opposed to Ant: passive. See Active voice, under Voice.
(b) Applied to verbs which assert that the subject acts upon or affects something else; transitive.
(c) Applied to all verbs that express action as distinct from mere existence or state. Active capital, Active wealth, money, or property that may readily be converted into money.
Synonyms
— Agile; alert; brisk; vigorous; nimble; lively; quick; sprightly; prompt; energetic.