(transitive) To cause to move faster; to quicken the motion of; to add to the speed of.

(transitive) To quicken the natural or ordinary progression or process of.

(transitive, physics) To cause a change of velocity.

(transitive) To hasten, as the occurrence of an event.

(transitive, education) To enable a student to finish a course of study in less than normal time.

(intransitive) To become faster; to begin to move more quickly.

(intransitive) Grow; increase.

(archaic) Accelerated; quickened; hastened; hurried.