Meaning of speed

Definition of speed

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

Other information on speed

WIKIPEDIA results for speed
Amazon results for speed