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



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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 Snowflake expects growth to decelerate to still-high double digit rates. Peter Cohan, Forbes, 24 Sep. 2021 Post-2030, growth will decelerate but by 2050 China’s gas demand could reach around 660 bcm. Wood Mackenzie, Forbes, 22 Sep. 2021 But trading activity has recently started to slow across the industry, and for the third quarter Robinhood forecast that new account openings would decelerate. Francesca Fontana, WSJ, 18 Sep. 2021 The Biden administration and the Federal Reserve insist that higher inflation is transitory, in part because car-price growth will decelerate as supply chain bottlenecks get resolved. Stephen Miran, WSJ, 8 Aug. 2021 But generally the only way to decelerate the froth and pull prices back down in line in any market is to stop feeding the bull. Peter Lane Taylor, Forbes, 28 May 2021 While the economy continues to recover, our work shows that the pace of the recovery is already starting to decelerate. CNN, 4 Aug. 2021 Drivers also need roadway to decelerate after crossing the finish line. Bill Bowden, Arkansas Online, 28 June 2021 Oregon health officials announced 269 new coronavirus cases Wednesday and 16 additional deaths connected to COVID-19 as the state’s infection case growth continues to decelerate for the sixth week straight. oregonlive, 10 June 2021

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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Dictionary Entries Near decelerate

deceive oneself into thinking


deceleration lane

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Statistics for decelerate

Last Updated

9 Oct 2021

Cite this Entry

“Decelerate.” Dictionary, Merriam-Webster, Accessed 24 Oct. 2021.

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English Language Learners Definition of decelerate

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


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.


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

More from Merriam-Webster on decelerate

Nglish: Translation of decelerate for Spanish Speakers

Britannica English: Translation of decelerate for Arabic Speakers


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