acceleration
ac·cel·er·a·tion
/ıkˌsɛləˈreıʃən/ noun
1 : the act or process of moving faster or happening more quickly : the act or process of accelerating
[ noncount ] The car delivers quick/rapid acceleration.
The car has good acceleration. [=the car is able to accelerate quickly]
There has been some acceleration in economic growth.
[ singular ] There has been an acceleration in economic growth.
2 [ noncount ] physics : the rate at which the speed of a moving object changes over time
