Accelerate meaning : To cause to move faster; to quicken the motion of; to add to the speed of. To quicken the natural or ordinary progression or process of. To cause a change of velocity. To hasten, as the occurrence of an event. To enable a student to finish a course of study in less than normal time. To become faster; to begin to move more quickly. Grow; increase. Accelerated; quickened; hastened; hurried.