CONTROLLER

n. inspector, supervisor; comptroller, person in a business or company who is responsible for checking and handling financial matters (such as expenditures, etc.), chief accountant of a company, person in charge of the accounting activities in a company (Finance); one who is in control; hardware device that manages a particular physical device (Computers)

Controller can refer to several things:Microcontroller, a computing deviceMemory controller, logic which manages the flow of data in a computer systemGame controller, a device used for video gamesController (computing), a chip or extension card that interfaces with a peripheral deviceComptroller, the accounting positionController (control theory), in control theoryController (irrigation), a device to automate irrigation systemsController (control systems), a device used in Control systemsController (orienteering), an organizer of orienteering eventsModel-view-controller, an architectural pattern used in software engineeringTrain Controller, an AC to DC converter used in model railways or track carsIn fiction:Controller (Marvel Comics), a Marvel Comics supervillainControllers (DC Comics), an alien race in DC comicsController, in the Animorphs book and television seriesThe Controller, an AI system in the Armored Core 3 video game
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Noun
1. someone who maintains and audits business accounts
(synonym) accountant, comptroller
(hypernym) businessperson, bourgeois
(hyponym) auditor
(derivation) control
2. a person who directs and restrains
(synonym) restrainer
(hypernym) person, individual, someone, somebody, mortal, human, soul
(hyponym) subduer, surmounter, overcomer
(derivation) control, command
3. a mechanism that controls the operation of a machine; "the speed control on his turntable was not working properly"; "I turned the controls over to her"
(synonym) control
(hypernym) mechanism
(hyponym) cruise control

n. controller, inspector, supervisor; one who is in control; hardware device that manages a particular physical device (Computers)

(n.)
One who, or that which, controls or restraines; one who has power or authority to regulate or control; one who governs.
  

(n.)
An officer appointed to keep a counter register of accounts, or to examine, rectify, or verify accounts.
  

(n.)
An iron block, usually bolted to a ship's deck, for controlling the running out of a chain cable. The links of the cable tend to drop into hollows in the block, and thus hold fast until disengaged.