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turn on

verb
  1. To set a flow of fluid or gas running by rotating a tap or valve.

    "Turn on the tap"

  2. To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.).

    "Please turn on automatic updates."

  3. (of a device) To start operating; to power up, to become on.

    "My computer won't turn on."

Antonymsturn off

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