DictionarycontrollerPerson in charge
noun

controller

kun-TROH-ler/kənˈtrəʊlər/

A person or device directing how something operates.

The handheld controller directs the action on the connected game console.

A wired handheld game controller connected to a game console, with the controller prominent so the regulating device is immediately recognizable.
Etymology

The “against” and “roll” pieces apparently refer to checking accounts against a duplicate register. An official who checked accounts became, more broadly, a person or device that directs or regulates.

In context

CrashCourse5:59
the controller took advantage of our natural movements, allowing the player to move their character through their own physical body movement.
Input Devices: Crash Course Games #24

More examples

  • A temperature controller keeps the greenhouse warm overnight.
  • She uses a wireless controller to play the racing game.
  • The factory's controllers regulate the speed of the conveyor belts.

Forms

controller · controllers

control verb — To direct or regulate how something operates.

Similar words

supervisor
Usually a person overseeing workers, rather than a regulating device.
regulator
Emphasizes maintaining limits or standards rather than directing overall operation.