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adjective active pronunciation in American 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 for this sense of active
    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.

  2. 2
    taking positive action in order to make something happen, instead of 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.

  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

    2. b.
      an active electrical system is working

      The burglar alarm becomes active ten seconds after you set it.

      Synonyms and related words for this sense of active
  4. 5
    chemistry producing a chemical or biological reaction

    What is the active ingredient in detergents?

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