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

Spotify has announced Sound Up -- a five-day accelerator program designed to educate and support women of color in developing podcasts, from idea to pilot production -- will return to New York City this summer. Chris Eggertsen, Billboard, "Spotify Announces Return of 'Sound Up' Podcast Accelerator for Women of Color," 7 June 2019 Yet the Daytona and Talladega Superspeedways are great equalizers: The tracks are so fast that the engine horsepower is choked down from about 750 to 450, so even the richest guys can’t just press the accelerator and pass a slower car., "Small NASCAR racing margins often come from big bucks," 8 July 2018 Using two volutes reduces turbo lag, the delay between pressing the accelerator and when the turbo kicks in, and improves low-RPM torque. Matthew Jancer, Popular Mechanics, "Moving More With Less: Why Four-Cylinders Are Coming to Full-Size Trucks," 21 June 2018 This is a gamble that’s not for everyone, but that’s why the Giants hired someone who wouldn’t be afraid to press the accelerator if the team decided not to tear the roster down. Conor Orr,, "Why Are the Giants Still Building Around 37-Year-Old Eli Manning?," 4 May 2018 In order to grow, Rise applied to several business accelerators that could provide money and mentorship. Larissa Zimberoff, New York Times, "From Brewery to Bakery: A Flour That Fights Waste," 25 June 2018 Thanks to its updated gyroscope and accelerator, the new Apple Watch also has a slip -and-fall tracking feature. Eric Limer, Popular Mechanics, "iPhone XS, iPhone XR, Apple Watch and More: Apple's 2018 iPhone Event Roundup," 12 Sep. 2018 Probably not, but an abundance of accelerator programs and easy capital means more people than ever have the chance to at least try their hand at launching a startup. Heather Mack, WSJ, "Accelerators Try Their Hand at Online Schools to Reach More Would-Be Founders," 13 Mar. 2019 While Qualcomm added a pair of vector engines and a tensor engine as additional accelerators, a more interesting addition is a dedicated voice assistant core, specifically designed to power assistants like the Google Assistant. Mark Hachman, PCWorld, "Meet Qualcomm's Snapdragon 855: AI boosts, a smarter camera, mobile gaming—and bye-bye, JPEG," 5 Dec. 2018

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

15 Jun 2019

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Time Traveler for accelerator

The first known use of accelerator was in 1611

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More Definitions for accelerator



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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More from Merriam-Webster on accelerator

Rhyming Dictionary: Words that rhyme with accelerator

Spanish Central: Translation of accelerator

Nglish: Translation of accelerator for Spanish Speakers

Britannica English: Translation of accelerator for Arabic Speakers Encyclopedia article about accelerator

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