Deceleration (noun)

A decrease in the speed of something over time.

Origin:

Derived from the verb 'decelerate' meaning to slow down or decrease speed.

Examples:

1. The car experienced a sudden deceleration in the emergency stop.
2. The deceleration of the economy was due to a decrease in consumer spending.
3. The deceleration was measured by a decrease in the velocity of the object.
4. The deceleration was accompanied by a loud screeching sound from the brakes.
5. The spacecraft experienced a rapid deceleration as it entered the planet's atmosphere.