1

speed

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noun \ˈspēd\

Definition of speed

  1. 1 archaic :  prosperity in an undertaking :  success

  2. 2a :  the act or state of moving swiftly :  swiftnessb :  rate of motion: such as (1) :  velocity 1 (2) :  the magnitude of a velocity irrespective of directionc :  impetus

  3. 3 :  swiftness or rate of performance or action :  velocity 3a

  4. 4a :  the sensitivity of a photographic film, plate, or paper expressed numericallyb :  the light-gathering power of a lens or optical systemc :  the time during which a camera shutter is open

  5. 5 :  a transmission gear in automotive vehicles or bicycles —usually used in combination a ten-speed bicycle

  6. 6 :  someone or something that appeals to one's taste just my speed

  7. 7 :  methamphetamine; also :  a related stimulant drug and especially an amphetamine

speedster

play \ˈspēd-stər\ noun

at speed

chiefly British

  1. :  fast, rapidly

up to speed

  1. :  operating at full effectiveness or potential

Examples of speed in a Sentence

  1. This instrument measures wind speed.

  2. The machine was operating at high speed.

  3. traveling at nearly the speed of light

  4. Under the right conditions the car can reach speeds over 200 miles an hour.

  5. The vehicle maintained a speed of 40 miles per hour.

  6. The work was done with remarkable speed.

  7. This computer works at a much faster processing speed than my old one.

  8. The machine chops up tree branches and leaves with speed and ease.

Recent Examples of speed from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'speed'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of speed

Middle English spede, from Old English spēd; akin to Old High German spuot prosperity, speed, Old English spōwan to succeed, Latin spes hope, Lithuanian spėti to be in time

Synonym Discussion of speed

haste, hurry, speed, expedition, dispatch mean quickness in movement or action. haste applies to personal action and implies urgency and precipitancy and often rashness. marry in haste hurry often has a strong suggestion of agitated bustle or confusion. in the hurry of departure she forgot her toothbrush speed suggests swift efficiency in movement or action. exercises to increase your reading speed expedition and dispatch both imply speed and efficiency in handling affairs but expedition stresses ease or efficiency of performance and dispatch stresses promptness in concluding matters. the case came to trial with expedition paid bills with dispatch

2

speed

verb

Definition of speed

sped

play \ˈsped\ or

speeded

;

speeding

  1. intransitive verb
  2. 1a archaic :  to prosper in an undertakingb archaic :  get along, fare

  3. 2a :  to make haste sped to her bedsideb :  to go or drive at excessive or illegal speed

  4. 3 :  to move, work, or take place faster :  accelerate the heart speeds up

  5. transitive verb
  6. 1a archaic :  to cause or help to prosper :  aidb :  to further the success of

  7. 2a :  to cause to move quickly :  hastenb :  to wish Godspeed toc :  to increase the speed of :  accelerate

  8. 3 :  to send out speed an arrow

speeder

noun

Examples of speed in a Sentence

  1. A group of kids sped past us on their bikes.

  2. They jumped in the car and sped away.

  3. A car was speeding down the street.

  4. An ambulance sped her to the hospital.

  5. I got pulled over twice last month because I was speeding on the highway.

Recent Examples of speed from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'speed'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of speed

before 12th century



SPEED Defined for English Language Learners

speed

play
noun

Definition of speed for English Language Learners

  • : the rate at which someone or something moves or travels

  • : the rate at which something happens or is done

  • : the quality of being quick

speed

verb

Definition of speed for English Language Learners

  • : to move fast

  • : to move (someone or something) somewhere very quickly

  • : to drive faster than the legal speed limit


SPEED Defined for Kids

1

speed

play
noun \ˈspēd\

Definition of speed for Students

  1. 1 :  quickness in movement or action

  2. 2 :  rate of moving or doing a speed of 100 miles an hour


2

speed

play
verb

Definition of speed for Students

sped

\ˈsped\ or

speeded

;

speeding

  1. 1 :  to move or cause to move fast :  hurry

  2. 2 :  to go or drive at too high a rate of movement I got a ticket for speeding.

  3. 3 :  to increase the rate of an action or movement How can we speed this process?

speed up

  1. :  to move more quickly


Medical Dictionary

speed

play
noun \ˈspēd\

Medical Definition of speed

  1. :  methamphetamine; also :  a related stimulant drug and especially an amphetamine



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