1. One who, or that which, controls or restraines; one who has power or authority to regulate or control; one who governs.
The great controller of our fate
Deigned to be man, and lived in low estate. --Dryden.
2. An officer appointed to keep a counter register of accounts, or to examine, rectify, or verify accounts. [More commonly written controller.]
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.
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.
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.
n 1: someone who maintains and audits business accounts [syn: accountant,
2: a person who directs and restrains [syn: restrainer]
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" [syn: control]