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   speed

   /spiːd/

   noun

   • 1. the rate at which someone or something moves or operates or is able to move or operate: "we turned on to the runway and began to gather speed" Similar ratepacetempomomentum
   • ▪ rapidity of movement or action: "the accident was due to excessive speed" Similar rapidityswiftnessspeedinessalacrityquicknessfastnesscelerityvelocitydispatchpromptnessimmediacyexpeditiousnessexpeditionbrisknesssharpnesshastehurryhurriednessprecipitatenessaccelerationinformal:lickclipliterary:fleetnessrare:alacritousnessOpposite slownessdilatoriness
   • ▪ the rate at which something happens or is done: "they were bemused by the speed of events"
   • ▪ something that matches one's tastes or inclinations: informal "oak tables and chairs are more his speed"
   • 2. each of the possible gear ratios of a bicycle or motor vehicle.
   • 3. the light-gathering power or f-number of a camera lens.
   • ▪ the duration of a photographic exposure.
   • ▪ the sensitivity of photographic film to light.
   • 4. an amphetamine drug, especially methamphetamine. informal
   • 5. success; prosperity: archaic "wish me good speed"

   verb

   • 1. move quickly: "I got into the car and home we sped" Similar hurryracerunsprintdashboltdartrushhastenhurtlecareerstreakshootwhizzzoomgo like lightninggo hell for leatherspank alongbowl alongrattle alongwhirlwhooshbuzzswoopflashblastchargestampedegallopsweephareflywingscurryscudscutterscrambleinformal:beltpelttearhotfoot itzapzipwhipscootscorchburn rubbergo like a bat out of hellbombbucketshiftput one's foot downgo like the clappersleg itwheechclipboogiehightailbarrellay rubberget the lead outvulgar slang:drag/tear/haul assliterary:fleetarchaic:posthierare:driveOpposite amblestroll
   • ▪ (of a motorist) travel at a speed that is greater than the legal limit: "the car that crashed was speeding" Similar drive too fastexceed the speed limitbreak the speed limit
   • 2. make prosperous or successful: archaic "may God speed you"
   • 3. take or be under the influence of an amphetamine drug: informal "more kids than ever are speeding, tripping, and getting stoned"

   Word Origin Old Englishspēd (noun), spēdan (verb), from the Germanic base of Old English spōwan ‘prosper, succeed’, a sense reflected in early usage.

   Derivatives

   • 1. speeder noun

   Scrabble Points: 8

   • S

     1

   • P

     3

   • E

     1

   • E

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   • D

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2. People also ask

   What does speed mean?

   • Speed is also the rate at which something travels, expressed as the number of meters in a second. [ C ] I have a ten-speed bicycle. The error can be speedily corrected. [ I ] The train sped along at over 120 miles per hour. [ I ] This year seems to be speeding by/past.

   SPEED | English meaning - Cambridge Dictionary

   dictionary.cambridge.org/dictionary/english/speed

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   What is a unit of speed?

   • Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion. Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph).

   Speed - Wikipedia

   en.wikipedia.org/wiki/Speed

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   What is speed in physics?

   • Speed is one such measurable quantity that measures the ratio of the distance travelled by an object to the time required to travel that distance. In this session, let us learn in detail about speed. What is Speed? What is Speed? Speed is defined as The rate of change of position of an object in any direction.

   What Is Speed? - Definition, Formula, Unit, Types & Measurement

   byjus.com/physics/measurement-of-speed/

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   What does it mean if someone is speeding?

   • Someone who is speeding is driving a vehicle faster than the legal speed limit. This man was not qualified to drive and was speeding. [VERB] He was fined for speeding last year. Speed is an illegal drug such as amphetamine which some people take to increase their energy and excitement.

   SPEED definition and meaning | Collins English Dictionary

   www.collinsdictionary.com/dictionary/english/speed

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3. byjus.com › physics › measurement-of-speedWhat Is Speed? - Definition, Formula, Unit, Types & Measurement

   byjus.com › physics › measurement-of-speed

   • Cached

   Speed is measured as the ratio between the distance and time and the SI unit of speed is m/s. It is the change in the position of an object with respect to time. There are four types of speed: uniform speed, variable speed, average speed, and instantaneous speed.

   • Units of Speed

     Speed is defined as the rate of change of distance with...

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     Define Newton’s third law of motion. Newton’s third law of...

   • Gamma Particle

     Alpha, Beta and Gamma Radiation. Not all atoms are stable....

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     Heat transfer by radiation takes place at the speed of light...

   • Difference Between Speed And Velocity

     The difference between speed and velocity is also a very...

   • Average Speed And Average Velocity

     Speed: Speed is a scalar quantity which means it has no...

4. dictionary.cambridge.org › dictionary › englishSPEED | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

   • Cached

   speed noun (RATE OF MOVEMENT) Add to word list. B1 [ C or U ] how fast something moves: He was travelling at a speed of 90 mph. The car has a top speed of 155 miles per hour. You should lower / reduce your speed as you approach a junction. On a clear, straight road you can gather / pick up speed.

5. www.merriam-webster.com › dictionary › speedSpeed Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › speed

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   1. a. : rate of motion: such as. (1) : velocity sense 1. (2) : the magnitude of a velocity irrespective of direction. b. : the act or state of moving swiftly : swiftness. c. : impetus. 2. : swiftness or rate of performance or action : velocity sense 3a. 3. a. : the sensitivity of a photographic film, plate, or paper expressed numerically. b.

6. en.wikipedia.org › wiki › SpeedSpeed - Wikipedia

   en.wikipedia.org › wiki › Speed

   • Cached

   Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion. Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph).

7. www.dictionary.com › browse › speedSPEED Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › speed

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   Speed definition: rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity. See examples of SPEED used in a sentence.

8. www.collinsdictionary.com › dictionary › englishSPEED definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   a scalar measure of the rate of movement of a body expressed either as the distance travelled divided by the time taken (average speed) or the rate of change of position with respect to time at a particular point (instantaneous speed).

9. www.thefreedictionary.com › speedSpeed - definition of speed by The Free Dictionary

   www.thefreedictionary.com › speed

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   1. rapidity in moving, traveling, performing, etc.; swiftness. 2. relative rate of motion or progress: the speed of light. 3. a gear ratio in a motor vehicle or bicycle. 4. a. the sensitivity of a photographic film or paper to light. b. the length of time a shutter is opened to expose film.