expedition, hastening, hurrying, quickening, speeding up, spurring, stepping up (informal) stimulation
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1 n-uncount The accelerationof a process or change is the fact that it is getting faster and faster.
oft N of/in n
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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