Main Entry: ac·cel·er·a·tion

Pronunciation: \ik-ˌsel-ə-ˈrā-shən, (ˌ)ak-\

Function: noun

1 : the act or process of accelerating : the state of being accelerated
2 : change of velocity ; also : the rate of this change
3 : advancement in mental growth or achievement beyond the average for one's age