con·​trol·​ler | \ kən-ˈtrō-lər , ˈkän-ˌtrō- \

Definition of controller

c : the chief accounting officer of a business enterprise or an institution (such as a college)
2a : one that controls or has power or authority to control air traffic controller

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Other Words from controller

controllership \ kən-​ˈtrō-​lər-​ˌship , ˈkän-​ˌtrō-​ \ noun

Synonyms for controller


control, regulator

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Examples of controller in a Sentence

the controllers for the video game system seem fairly well designed

Recent Examples on the Web

The smartest system on the market may be the U by Moen, a multivalve approach that offers three different ways to control your shower: tapping a companion smartphone app, using a wall controller or just shouting. Rachel Jacoby Zoldan, WSJ, "Smart Showers, Brainy Tubs: The Rise of the High-Tech Bathroom," 19 Sep. 2018 The astronauts on the ISS first discovered the hole in late August after flight controllers at NASA noticed that the air pressure was dropping, a sign that air was slowly leaking out of the station. Loren Grush, The Verge, "Russian cosmonauts are spacewalking to figure out the origin of a mysterious spacecraft hole," 11 Dec. 2018 Fourth to orbit Around the time NASA flight controllers were scrambling to land humans on the Moon, Japan was just trying to get its first rocket into space. Eric Berger, Ars Technica, "Quietly, Japan has established itself as a power in the aerospace industry," 15 Nov. 2018 Meanwhile, Garcia, a former Houston city controller, will rep Texas’ 29th congressional district. Lauren Underwood (D-IL) became the first black woman to win her Illinois district. Erica Gonzales, Harper's BAZAAR, "20 Big Firsts and Historic Wins from the 2018 Midterm Elections," 7 Nov. 2018 Green is the wife of former Houston city controller and councilman Ronald Green. Mihir Zaveri, Houston Chronicle, "Embattled Justice of the Peace Hilary Green resigns, citing family issues," 29 Mar. 2018 That subscription unlocks features like access to sample and loop libraries and support for loads of MIDI controllers from popular brands. Dani Deahl, The Verge, "Djay relaunched on iOS with subscription model and powerful performance features," 12 Dec. 2018 With landing day so close to Thanksgiving, many of the flight controllers will be eating turkey at their desks on the holiday. Marcia Dunn, The Seattle Times, "Mars revisited: NASA spacecraft days away from risky landing," 21 Nov. 2018 An electronic speed controller (ESC) delivers those calculations to the motors. Trevor Bauer, Popular Mechanics, "How To Build Your Own Drone," 23 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'controller.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of controller

15th century, in the meaning defined at sense 1a

History and Etymology for controller

Middle English countreroller, from Anglo-French contreroulur, from contreroule

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Last Updated

10 Feb 2019

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Time Traveler for controller

The first known use of controller was in the 15th century

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English Language Learners Definition of controller

: a person who is in charge of the money received and paid out by a business or college
: a person who directs the action of something
: a device or piece of equipment used to operate a machine, vehicle, or system


con·​trol·​ler | \ kən-ˈtrō-lər, ˈkän-ˌtrō- \

Legal Definition of controller

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Comments on controller

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excited commotion or publicity

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