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

Synonyms & Antonyms for decelerate

Synonyms

brake, retard, slacken, slow

Antonyms

accelerate, hasten, hurry, quicken, rush, speed (up), step up

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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

Wall Street’s consensus calls for gross merchandise volume growth for eBay’s marketplace business to decelerate to about 3% this year compared with an estimated 8% for 2018, according to FactSet. Laura Forman, WSJ, "Can Activist Lightning Strike Twice for eBay?," 22 Jan. 2019 Concerns also remain about the pace of economic growth heading into 2019, as some investors expect the expansion to decelerate after two consecutive quarters of above-trend growth earlier this year. Daniel Kruger, WSJ, "U.S. Government Bonds Gain as Stocks Sink," 4 Dec. 2018 The economy likely further decelerated in the final quarter of the year and is expected to continue in the first quarter of 2019, said economists at Huatai Securities in a research note. WSJ, "China’s Manufacturing Sector Contracts," 30 Dec. 2018 Consumer spending has decelerated because of a combination of tougher mortgage-financing rules and higher interest rates. Paul Vieira, WSJ, "Canada Unveils Tax Incentives to Offset Trump Effect," 21 Nov. 2018 Favorable domestic supply conditions helped headline inflation decelerate to low single digit levels, the central bank said in a statement. Anusha Ondaatjie, Bloomberg.com, "Sri Lanka Holds Benchmark Rates as Consumer Prices Ease," 11 May 2018 Still, economists forecast that growth will slow in the fourth quarter and decelerate further next year. Christopher Rugaber, The Seattle Times, "US economy grew at brisk 3.5 pct. annual rate last quarter," 28 Nov. 2018 To date, business investment has been lackluster, with growth decelerating in the second quarter to 1.5% annualized, or the slowest advance since late 2016. Paul Vieira, WSJ, "Canada Unveils Tax Incentives to Offset Trump Effect," 21 Nov. 2018 During this stage, your heartbeat, breathing, and eye movements decelerate, your muscles relax, and your brain waves begin to slow down, the National Institute of Neurological Disorders and Stroke says. Korin Miller, SELF, "7 Reasons You Might Wake Up Gasping for Air," 2 Oct. 2018

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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Statistics for decelerate

Last Updated

1 Mar 2019

Look-up Popularity

Time Traveler for decelerate

The first known use of decelerate was in 1899

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More Definitions for decelerate

decelerate

verb

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 deceleration (audio) \ noun

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