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English Dictionary

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 speed speed

noun

  • () distance travelled per unit time  ( velocity, speed )
    distance travelled per unit time
  • () a rate (usually rapid) at which something happens  ( fastness, swiftness, speed )
    a rate (usually rapid) at which something happens
     the project advanced with gratifying speed
    the project advanced with gratifying speed
  • () changing location rapidly  ( hurrying, speeding, speed )
    changing location rapidly
  • a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression  ( amphetamine, pep pill, speed, upper )
    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  ( f number, focal ratio, speed, stop number )
    the ratio of the focal length to the diameter of a (camera) lens system
  • verb

  • () move hurridly  ( belt along, bucket along, cannonball along, hie, hotfoot, pelt along, rush along, step on it, hasten, speed, race, rush )
    move hurridly
     He rushed down the hall to receive his guests
    He rushed down the hall to receive his guests
     The cars raced down the street
    The cars raced down the street
  • () move faster  ( quicken, speed up, speed, accelerate )
    move faster
     The car accelerated
    The car accelerated
  • () move very fast  ( travel rapidly, zip, speed, hurry )
    move very fast
     The runner zipped past us at breakneck speed
    The runner zipped past us at breakneck speed
  • () travel at an excessive or illegal velocity  ( speed )
    travel at an excessive or illegal velocity
     I got a ticket for speeding
    I got a ticket for speeding
  • () cause to move faster  ( speed up, accelerate, speed )
    cause to move faster
     He accelerated the car
    He accelerated the car