act on

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See also: acton and Acton



act on (phrasal verb)

  1. To act decisively on the basis of information received or deduced.
    The policeman decided to act on the tip from his informant.
  2. To take action against something.
    World leaders have repeatedly stated that we must act on climate change.
  3. (medicine) To affect something.
    Different drugs act on different parts of our body in many different ways.