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Definition of controller:

  1. A kind of multiple switch for gradually admitting the current to, or shutting it off from, an electric motor; as, a car controller for an electric railway car.
  2. A lever controlling the speed of an engine; - applied esp. to the lever governing a throttle valve, as of a steam or gasoline engine, esp. on an automobile.
  3. An electromagnet, excited by the main current, for throwing a regulator magnet into or out of circuit in an automatic device for constant current regulation.
  4. Any electric device for controlling a circuit or system;


mastery, restraint, ascendance, ascendancy, control condition, ascendance, dominance, command, ascendence, comptroller, ascendency, control, restrainer, accountant.

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