ac·​cel·​er·​a·​tor | \ ik-ˈse-lə-ˌrā-tər How to pronounce accelerator (audio) , ak-\

Definition of accelerator

: one that accelerates: such as
a : a muscle or nerve that speeds the performance of an action
b : a device (such as a pedal) for controlling the speed of a motor vehicle engine
c : a substance that speeds a chemical reaction
d : an apparatus for imparting high velocities to charged particles (such as electrons)
e : an item of computer hardware that increases the speed at which a program or function operates a graphics accelerator

Examples of accelerator in a Sentence

Recent Examples on the Web First, The Google for Entrepreneurs program, launched by Google in 2011, consisting of over 50 co-working spaces and accelerators in 125 countries, offering hands-on lessons for aspiring entrepreneurs. Lily Shaw, Twin Cities, "Startup Showcase: Offering and organizing equal-opportunity hackathons," 3 Nov. 2019 In that time, the accelerator has undergone three upgrades, and three state inspections of the facility have returned no violations, according to the Associated Press. Jennifer Leman, Popular Mechanics, "Did MIT Expose Researchers to Radiation?," 30 Oct. 2019 Adaptive shock absorbers keep the car from squatting back on its rear wheels even with the accelerator floored. Mark Phelan, Detroit Free Press, "760-horsepower 2020 Ford Mustang Shelby GT500 strikes like lightning," 29 Oct. 2019 That’s without the fancy custom Apple accelerator card, too. Gordon Mah Ung, PCWorld, "Can't wait for the Mac Pro? Build your own with the Dune Pro," 21 Oct. 2019 In the summer of 2018, Honeylove, a shapewear company, received funding from Y Combinator, a start-up accelerator. Sanam Yar, New York Times, "Spanx Started a Shapewear Revolution," 15 Oct. 2019 The startup has chugged through several incubator and accelerator programs, changing its course — and its address — more than once. Brittany Meiling, San Diego Union-Tribune, "From teen father to tech CEO: How LabFellows’ founder wound up designing ‘smarter’ labs," 14 Oct. 2019 An alum from the downtown Orlando StarterStudio accelerator has raised $2 million and, in the process, become the first to reach the max $225,000 investment from the program. Marco Santana,, "Orlando accelerator reaches $225,000 max investment in startup for 1st time," 10 Oct. 2019 When the Berkeley accelerator shut down in 1993, at the end of its lifespan, there was no financial support to build another heavy ion facility. Michele Cohen Marill, WIRED, "Why a Promising, Potent Cancer Therapy Isn't Used in the US," 21 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'accelerator.' 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 accelerator

1611, in the meaning defined above

History and Etymology for accelerator

accelerate + -or entry 1

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Statistics for accelerator

Last Updated

16 Nov 2019

Time Traveler for accelerator

The first known use of accelerator was in 1611

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More Definitions for accelerator


How to pronounce accelerator (audio)

English Language Learners Definition of accelerator

: a pedal in a vehicle that is pressed down to make the vehicle go faster
technical : a machine that causes charged particles (such as electrons and protons) to move at extremely high speeds


ac·​cel·​er·​a·​tor | \ ak-ˈse-lə-ˌrā-tər How to pronounce accelerator (audio) \

Kids Definition of accelerator

: a pedal in an automobile for controlling the speed of the motor


ac·​cel·​er·​a·​tor | \ ik-ˈsel-ə-ˌrāt-ər, ak- How to pronounce accelerator (audio) \

Medical Definition of accelerator

: one that accelerates: as
a : a muscle or nerve that speeds the performance of an action a cardiac accelerator
b : a substance that speeds a chemical reaction
c : an apparatus for imparting high velocities to charged particles (as electrons)

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Comments on accelerator

What made you want to look up accelerator? Please tell us where you read or heard it (including the quote, if possible).


to speed up the process or progress of

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