decelerate

verb

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

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
deceleration noun
decelerator noun

Examples of decelerate in a Sentence

she decelerated the car as we entered the school zone
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Inflation across the country decelerated a bit and behaved pretty much exactly as economists expected, according to the measure that the Federal Reserve prefers to use. Stan Choe, Los Angeles Times, 28 Feb. 2025 Puig, for instance, said overall beauty market business growth during the holiday season was moderate versus the rest of the year’s gains, which decelerated throughout the year. Kathryn Hopkins, WWD, 25 Feb. 2025 In some positive news, the landslide has decelerated since the time of NASA's analysis. Kristan Hawkins, Newsweek, 7 Feb. 2025 Analysts at Wedbush wrote in a Tuesday note that while Shopify’s first-quarter guide was in line with the firm’s estimates, the outlook implies that year-over-year revenue growth will decelerate to the mid-20% range from 31% growth in the fourth quarter. Annie Palmer, CNBC, 11 Feb. 2025 See All Example Sentences for decelerate

Word History

Etymology

de- + accelerate

First Known Use

1899, in the meaning defined at transitive sense 1

Time Traveler
The first known use of decelerate was in 1899

Cite this Entry

“Decelerate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/decelerate. Accessed 5 Mar. 2025.

Kids Definition

decelerate

verb
de·​cel·​er·​ate (ˈ)dē-ˈsel-ə-ˌrāt How to pronounce decelerate (audio)
decelerated; decelerating
: to move or cause to move at decreasing speed : slow down
deceleration noun

Medical Definition

decelerate

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

transitive verb

: to reduce the speed of : slow down

intransitive verb

: to move at decreasing speed
deceleration noun

More from Merriam-Webster on decelerate

Last Updated: - Updated example sentences
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