Accelerate

1. v. t. To hasten, as the occurence of an event; as, to accelerate our departure.
2. v. t. To cause to move faster; to quicken the motion of; to add to the speed of; — opposed to retard.
3. v. t. To quicken the natural or ordinary progression or process of; as, to accelerate the growth of a plant, the increase of wealth, etc.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.