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