controller
Americannoun
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an employee, often an officer, of a business firm who checks expenditures, finances, etc.; comptroller.
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a person who regulates, directs, or restrains.
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British Aeronautics. a dispatcher.
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a regulating mechanism; governor.
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Also called control unit, processor. Computers. the key component of a device, as a terminal, printer, or external storage unit, that contains the circuitry necessary to interpret and execute instructions fed into the device.
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Digital Technology. a remote piece of hardware used to direct or control an electronic device.
a video game controller.
noun
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a person who directs, regulates, or restrains
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Also called: comptroller. a business executive or government officer who is responsible for financial planning, control, etc
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the equipment concerned with controlling the operation of an electrical device
Other Word Forms
- controllership noun
Etymology
Origin of controller
First recorded in 1350–1400; Middle English countrollour, from Anglo-French countrero(u)llour, Middle French contrerolleur, equivalent to contrerolle “duplicate roll” + -eur, -our, from Latin -ōr- or -ātōr- noun suffixes; control, -or 2, -ator
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“We’re going to be addressing that, because that was not good,” the air traffic controller responded.
From Los Angeles Times • Mar. 26, 2026
Less than two minutes later, the emergency vehicle en route to United 2384 requests permission to cross the same runway, via taxiway D. After a slight hesitation, the controller gives the green light.
From The Wall Street Journal • Mar. 24, 2026
An air traffic controller was heard saying: "'Truck One, stop, stop, stop!" seconds before the crash.
From BBC • Mar. 24, 2026
Second controller: "Man, that wasn't good to watch."
From Barron's • Mar. 23, 2026
He exchanged the Wii controller for a screwdriver from his magic tool belt and tapped the statue’s pedestal.
From "The Mark of Athena" by Rick Riordan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
