acceleration

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ac|cel|era|tion /æks'elər'eɪʃən/
1 [N-UNCOUNT] oft N of/in n
The acceleration of a process or change is the fact that it is getting faster and faster.
He has also called for an acceleration of political reforms.
2 [N-UNCOUNT]
Acceleration is the rate at which a car or other vehicle can increase its speed, often seen in terms of the time that it takes to reach a particular speed.
Acceleration to 60 mph takes a mere 5.7 seconds.
3 [N-UNCOUNT]
Acceleration is the rate at which the speed of an object increases. (TECHNICAL)

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