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Definition of deceleration

deceleration

/diːˌsɛl.əˈreɪ.ʃən/
de · cel · er · a · tion
Plural:decelerations
•
Adjective:decelerative
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deceleration Lexical Profile

deceleration Game Scores & Validity

• noun

1

A reduction in speed or the rate of change of velocity; the act or process of slowing down.

Example

"The rapid deceleration of the train caused standing passengers to reach for the handrails."

2

A decrease in the rate of growth, activity, or progression, especially in an economic or demographic context.

Example

"Analysts predicted a gradual deceleration in housing price growth over the coming fiscal year."

Synonyms
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Antonyms
View all antonyms for deceleration

• Rhymes for deceleration

• Nearby Words

deceiver
deceivingly
decelerate
deceleration
decency
decent
decenter

Word Origin & Etymology

Coined in the late 19th century as an antonym to "acceleration," formed by substituting the Latin prefix de- (meaning "down" or "reversal") for ad- alongside the Latin root celer ("swift").

Cite this Entry

Wordmom. (2026). Definition of Deceleration. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/deceleration
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