decelerate

verb
de·​cel·​er·​ate | \ (ˌ)dē-ˈse-lə-ˌrāt How to pronounce decelerate (audio) \
decelerated; decelerating

Definition of decelerate

transitive verb

1 : to reduce the speed of : slow down decelerate a car
2 : to decrease the rate of progress of decelerate growth decelerate soil erosion

intransitive verb

: to move at decreasing speed

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Other Words from decelerate

deceleration \ (ˌ)dē-​ˌse-​lə-​ˈrā-​shən How to pronounce decelerate (audio) \ noun
decelerator \ (ˌ)dē-​ˈse-​lə-​rā-​tər How to pronounce decelerate (audio) \ noun

Synonyms & Antonyms for decelerate

Synonyms

Antonyms

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Examples of decelerate in a Sentence

she decelerated the car as we entered the school zone
Recent Examples on the Web Ending private equity’s grip on journalism would surely decelerate some of the massive cuts in reporting but wouldn’t be anywhere near sufficient to address the underlying challenges that capitalism ultimately poses to journalism. Rachel M. Cohen, The New Republic, "The Desperate Last Days of Local News," 14 Dec. 2020 Analysis of the crash video indicates Grosjean’s accident may have forced his body to decelerate at up to 67 Gs, or 67 times gravity. Rachel Lance, Wired, "A Race Car Crash From Hell—and the Science That Saved Its Driver," 6 Dec. 2020 More weight also adds inertia that must be overcome in order to accelerate or decelerate a spinning tire, impairing both braking and acceleration. Wes Siler, Outdoor Life, "How to Build the Ultimate Hunting Truck," 29 Sep. 2020 At best, Smoke said, real GDP growth could sharply decelerate to at most 1% on an annualized based in the fourth quarter. Susan Tompor, Detroit Free Press, "US economy to deliver record 3rd quarter — but spiking COVID-19 cases could bring slump," 28 Oct. 2020 Economists and policy makers, including Federal Reserve Chairman Jerome Powell, have warned that growth could decelerate further unless Congress passes additional aid. Kate Davidson, WSJ, "U.S. Budget Gap Tripled to Record $3.1 Trillion in Fiscal 2020, Treasury Says," 16 Oct. 2020 After the story began circulating across social media, Twitter and Facebook took steps to decelerate its spread. Tyler Van Dyke, Washington Examiner, "Twitter suspends Team Trump account for posting video related to New York Post Hunter Biden story," 15 Oct. 2020 Wednesday’s flyby will be its first of two around Venus, followed by six around Mercury itself, to accelerate or decelerate and change its orbit around the sun. NBC News, "A well-timed Venus flyby looks for signs of life in the clouds," 12 Oct. 2020 The administration’s goal for distributing the 15-minute tests is to speed up economic growth, which has slowed in recent months as states decelerate the reopening process. Cassidy Morrison, Washington Examiner, "Trump announces distribution of 150M rapid coronavirus tests," 28 Sep. 2020

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

1899, in the meaning defined at transitive sense 1

History and Etymology for decelerate

de- + accelerate

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Time Traveler for decelerate

Time Traveler

The first known use of decelerate was in 1899

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Statistics for decelerate

Last Updated

19 Dec 2020

Cite this Entry

“Decelerate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decelerate. Accessed 16 Jan. 2021.

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More Definitions for decelerate

decelerate

verb
How to pronounce decelerate (audio)

English Language Learners Definition of decelerate

: to move slower : to lose speed
: to cause (something) to happen more slowly

decelerate

verb
de·​cel·​er·​ate | \ dē-ˈse-lə-ˌrāt How to pronounce decelerate (audio) \
decelerated; decelerating

Kids Definition of decelerate

: to slow down The car decelerated at the yellow light.

decelerate

verb
de·​cel·​er·​ate | \ (ˈ)dē-ˈsel-ə-ˌrāt How to pronounce decelerate (audio) \
decelerated; decelerating

Medical Definition of decelerate

transitive verb

: to reduce the speed of : slow down

intransitive verb

: to move at decreasing speed

Other Words from decelerate

deceleration \ (ˌ)dē-​ˌsel-​ə-​ˈrā-​shən How to pronounce decelerate (audio) \ noun

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Comments on decelerate

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