(~s, decelerating, ~d)
1.
When a vehicle or machine ~s or when someone in a vehicle ~s, the speed of the vehicle or machine is reduced.
...the sensation of the train decelerating.
? accelerate
VERB: V
deceleration
The harder the brake pedal is pressed, the greater the car’s deceleration.
? acceleration
N-UNCOUNT
2.
When the rate of something such as inflation or economic growth ~s, it slows down.
Inflation has ~d remarkably over the past two years.
? accelerate
VERB: V
deceleration
...a significant deceleration in the annual rate of growth.
? acceleration
N-UNCOUNT