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1. Dictionary

   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

     1

   • D

     2

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   More definitions, origin and scrabble points

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

   byjus.com › physics › measurement-of-speed

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   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.

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

   www.merriam-webster.com › dictionary › speed

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   Noun This instrument measures wind speed. The machine was operating at high speed. traveling at nearly the speed of light Under the right conditions the car can reach speeds over 200 miles an hour. The vehicle maintained a speed of 40 miles per hour. The work was done with remarkable speed.

4. www.oxfordlearnersdictionaries.com › definition › englishspeed noun - Definition, pictures, pronunciation and usage notes...

   www.oxfordlearnersdictionaries.com › definition › english

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   Definition of speed noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

5. www.vocabulary.com › dictionary › speedSpeed - Definition, Meaning & Synonyms - Vocabulary.com

   www.vocabulary.com › dictionary › speed

   Speed most often describes acceleration or a high rate of motion. When something picks up too much speed, it can run off course, like a kid on a bike zooming uncontrollably down a steep hill. Speed can be a noun or verb. As a noun, it's an indicator of pace, as in the speed of a car.

6. www.britannica.com › story › whats-the-difference-betweenWhat's the Difference Between Speed and Velocity? | Britannica

   www.britannica.com › story › whats-the-difference-between

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   Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, speed is a scalar value, while velocity is a vector.

7. www.merriam-webster.com › thesaurus › speedSPEED Synonyms: 162 Similar and Opposite Words - Merriam-Webster

   www.merriam-webster.com › thesaurus › speed

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   Synonyms for SPEED: velocity, rate, hurry, pace, quickness, rapidity, swiftness, acceleration; Antonyms of SPEED: slowness, sluggishness, lethargy, reluctance, languor, torpidity, torpor, deliberation

8. dictionary.cambridge.org › essential-american-english › speedSPEED | English meaning - Cambridge Essential American

   dictionary.cambridge.org › essential-american-english › speed

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   SPEED definition: 1. how fast something moves or happens: 2. to move somewhere or happen very fast: 3. to be…. Learn more.