What is Controller?
Controller definition and meaning on Dictionary terms:
an employee, often an officer, of a business firm who checks expenditures, finances, etc.; comptroller.
a person who regulates, directs, or restrains.
British Aeronautics. a dispatcher.
a regulating mechanism; governor.
Also called control unit, processor. Computers. the key component of a device, as a terminal, printer, or external storage unit, that contains the circuitry necessary to interpret and execute instructions fed into the device.
a remote piece of hardware used to direct or control an electronic device: a video-game controller.