Noun:
1: velocity, speed distance travelled per unit time
2: fastness, speed, swiftness a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
3: speed, hurrying, speeding changing location rapidly
4: speed, f number, stop number, focal ratio the ratio of the focal length to the diameter of a (camera) lens system
5: upper, amphetamine, speed, pep pill a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
Verb:
1: hasten, bucket along, belt along, rush, hotfoot, cannonball along, hie, pelt along, rush along, race, speed step on it; "He rushed down the hall to receive his guests"; "The cars raced down the street"
2: accelerate, quicken, speed up, speed move faster; "The car accelerated"
3: speed travel at an excessive or illegal velocity; "I got a ticket for speeding"
4: hurry, speed, zip, travel rapidly move very fast; "The runner zipped past us at breakneck speed"
5: speed up, accelerate, speed cause to move faster; "He accelerated the car"