—v.t. 1. to cause faster or greater activity, development, progress, advancement, etc., in: to accelerate economic growth. 2. to hasten the occurrence of: to accelerate the fall of a government. 3. Mech.to change the velocity of (a body) or the rate of (motion); cause to undergo acceleration.
4. to reduce the time required for (a course of study) by intensifying the work, eliminating detail, etc.
—v.i. 1. to move or go faster; increase in speed.
2. to progress or develop faster.