noun

deceleration

deceleration, slowing down

The pilot began the plane's deceleration.

The pilot began the plane's deceleration.

There was a deceleration in economic growth.

There was a deceleration in economic growth.

((the deceleration of sth.)) the slowing down of (sth.) The deceleration of the car was sudden.

((a deceleration in sth.)) a reduction in the speed or rate of (sth.) There was a deceleration in sales.

Synonyms: slowing, reduction; Antonyms: acceleration, speeding up

From 'de-' (opposite of) + 'celer' (swift) + '-ation' (noun suffix). It is the direct opposite of 'acceleration'.

Think of 'de-' as in 'decrease' and 'celer' from 'accelerate'. It's a decrease in acceleration.

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