| ac�cel�er�a�tion Pronunciation: ik-"se-l&-'rA-sh&n, (")ak- Function: noun Date: 1531 1 : the act or process of accelerating : the state of being accelerated 2 : the rate of change of velocity with respect to time; broadly : change acceleration of gravity Date: circa 1889 : the acceleration of a body in free fall under the influence of earth's gravity expressed as the rate of increase of velocity per unit of time and assigned the standard value of 980.665 centimeters per second per second |