• Having the power or quality of acting; causing change; communicating action or motion; acting;—opposed to passive, that receives.
  • Quick in physical movement; of an agile and vigorous body; nimble.
  • In action; actually proceeding; working; in force
  • Given to action; constantly engaged in action; energetic; diligent; busy
  • Requiring or implying action or exertion
  • Given to action rather than contemplation; practical; operative
  • Brisk; lively.
  • Implying or producing rapid action.
  • About verbs.
  • Eligible to be processed by a compiler or interpreter.
  • Not passive.
  • enjoying a role in anal sex in which he penetrates, rather than being penetrated by his partner.


  • A person or thing that is acting or capable of acting.
  • Any component that is not passive. See Passivity (engineering).


  • From Middle English actyf, from Old French actif, from Latin activus, from ago, ultimately from Proto-Indo-European *h₂éǵeti.
  • Morphologically act + -ive.

Modern English dictionary

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