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changing location rapidly a rate (usually rapid) at which something happens; "the project advanced with gratifying speed" distance travelled per unit time travel at an excessive or illegal velocity; "I got a ticket for speeding" cause to move faster; "He accelerated the car" move very fast; "The runner zipped past us at breakneck speed" move faster; "The car accelerated" a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression the ratio of the focal length to the diameter of a (camera) lens system step on it; "He rushed down the hall to receive his guests"; "The cars raced down the street" |
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