Search Result for "controller": 
Wordnet 3.0

NOUN (3)

1. someone who maintains and audits business accounts;
[syn: accountant, comptroller, controller]

2. a person who directs and restrains;
[syn: restrainer, controller]

3. a mechanism that controls the operation of a machine;
- Example: "the speed controller on his turntable was not working properly"
- Example: "I turned the controls over to her"
[syn: control, controller]

The Collaborative International Dictionary of English v.0.48:

Controller \Con*trol"ler\, n. [From control, v. t.: cf. F. contr[^o]leur.] 1. One who, or that which, controls or restraines; one who has power or authority to regulate or control; one who governs. [1913 Webster] The great controller of our fate Deigned to be man, and lived in low estate. --Dryden. [1913 Webster] 2. An officer appointed to keep a counter register of accounts, or to examine, rectify, or verify accounts. [More commonly written controller.] [1913 Webster] 3. (Naut.) 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. [1913 Webster] 4. (Elec.) Any electric device for controlling a circuit or system; specif.: (a) 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. (b) 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. [Webster 1913 Suppl.] 5. (Mach.) 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. [Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):

controller n 1: someone who maintains and audits business accounts [syn: accountant, comptroller, controller] 2: a person who directs and restrains [syn: restrainer, controller] 3: a mechanism that controls the operation of a machine; "the speed controller on his turntable was not working properly"; "I turned the controls over to her" [syn: control, controller]
Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "controller": Big Brother, CA, CPA, accountant, accountant general, actuary, auditor, bank accountant, bank examiner, boatswain, bookkeeper, boss, bursar, calculator, cashier, cashkeeper, certified public accountant, chamberlain, chartered accountant, chief, clerk, comptroller, control, cost accountant, cost keeper, curator, depositary, depository, financial officer, floor manager, floorman, floorwalker, foreman, gaffer, ganger, governor, head, headman, inspector, journalizer, liquidator, monitor, noncommissioned officer, overman, overseer, paymaster, proctor, purse bearer, purser, receiver, reckoner, recorder, registrar, regulator, servo control, servo regulator, sirdar, slave driver, steward, straw boss, subforeman, super, superintendent, supervisor, surveyor, taskmaster, treasurer, trustee, visitor
The Free On-line Dictionary of Computing (30 December 2018):

controller Part of a computer, typically a separate circuit board, which allows the computer to use certain kinds of peripheral devices. A disk controller is used to connect hard disks and floppy disks, a network controller is used for Ethernet. Other controllers are: keyboard controller, interrupt controller and graphics controller. (1998-03-16)