a person who directs, regulates, or restrains - Also called: comptroller
a business executive or government officer who is responsible for financial planning, control, etc the equipment concerned with controlling the operation of an electrical device
WordReference Random House Learner's Dictionary of American English © 2026
con•trol•ler /kənˈtroʊlɚ/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Businessa government official or an officer of a business firm in charge of financial accounts and transactions;
comptroller:The state controller decided that contributions to the pension fund would stop. - a person who regulates or restrains.
- Mechanical Engineeringa regulating mechanism;
governor.
con•trol•ler
(kən trō′lər),USA pronunciation n.
con•trol′ler•ship′, n.
- Businessan employee, often an officer, of a business firm who checks expenditures, finances, etc.;
comptroller. - a person who regulates, directs, or restrains.
- [Brit. Aeron.]a dispatcher.
- a regulating mechanism;
governor. - ComputingAlso called control unit, processor. the key component of a peripheral device, as a terminal, printer, or external storage unit, that contains the circuitry necessary to interpret and execute instructions fed into the device.
- Latin -ōr- -or2 or -ātōr- -ator
- Anglo-French countrero(u)llour, Middle French contrerolleur, equivalent. to contrerolle duplicate roll (see control) + -eur, -our
- Middle English countrollour 1350–1400
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