Meaning & use
deceleration
A decrease in speed; the process of slowing down.
See it in a sentence
The sudden deceleration of the train threw several passengers off balance.
Engineers measured the car's deceleration when the brakes were applied at high speed.
A note on using this word
Deceleration is the standard scientific and technical term for negative acceleration, used especially in physics and engineering.
Words with a similar meaning
slowdownslowing
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
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