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adjective active pronunciation in British English /ˈæktɪv/
  1. 1
    someone who is active does a lot of different activities and has a lot of energy and interests
    People are remaining active into later life.
    meditation techniques to keep the mind active and alert
    Synonyms and related words
    1. a.
      very involved in the work of an organization or with a particular activity
      active in: She continues to be active in politics.
      active member: He is an active member of the American Cancer Society.
      Synonyms and related words
  2. 2
    taking positive action in order to make something happen, rather than just hoping that it will happen
    There are already active discussions going on.
    Active steps are being taken to calm the situation.
    We couldn’t have organized the show without the active support and participation of the students’ parents.
    Synonyms and related words
  3. 3
    operating or working in a particular area or at a particular time
    Pickpockets are known to be active in the area.
    1. a.
      regularly doing a particular activity
      sexually active (=having sex regularly): sexually active young women
      Synonyms and related words
    2. b.
      an active electrical system is working
      The burglar alarm becomes active ten seconds after you set it.
  4. 5
    chemistry producing a chemical or biological reaction
    What is the active ingredient in detergents?

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