Meaning of word sped

A derogatory term meaning retard. Comes from the phrase special education.

Josephine Beiter is sped.

by Joiscool2019 March 6, 2018

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Sped

1. One who attends special education classes.

2. The special education program.

3. An insult used when someone does something stupid.

1. «He is a sped.»

2.a «She is in sped ed.»

2.b «She is in sped.»

3. «Darren you are such a sped.»

by Dana M. October 24, 2003

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Sped

An insult derived from the shortening of «special education».

Person 1: I can’t believe I walked into that sign post.

Person 2: Yeah, you should move to the sped class. You’ll be right at home.

by doughnut November 19, 2007

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Sped

The term sped is used for someone who is in the special education program.

by danamiche November 6, 2003

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Sped

the past tense word of speed

it is also an abbreviation of special education or people who are special needs.

a car full of speds going to sped sped past the house

by williemac98 February 21, 2012

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Sped

An insult saying someone is fucking retarted or in Special Education

You’re such a sped monkey Micheal!

You sped monkey!

by Sped Monkey January 6, 2022

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Sped

Usually a person with flaws, spends all their time on fortnite even in class, nickname Alex Weiser

Alex Weiser is sped

by Definitions creator May 1, 2018

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More random definitions

ускорившийся

неправильный глагол

- past и p. p. от speed

Мои примеры

Словосочетания

car sped along the road — машина мчалась по дороге  
sped up — увеличивать  

Примеры с переводом

Time sped by.

Время быстро пронеслось.

A car sped past in a cloud of dust.

Мимо в облаке пыли промчался автомобиль.

He jumped into his car and sped off.

Он прыгнул в машину и умчался.

A group of kids sped past us on their bikes.

Мимо нас велосипедах промчалась ватага детишек.

A shooting star sped across the sky.

По небу пронеслась падающая звезда.

The car sped by at a whopping 110 miles per hour.

Автомобиль промчался мимо на огромной скорости — сто десять миль в час.

She sped up the process by eliminating all extraneous steps.

Она ускорила этот процесс, устранив все излишние шаги.

ещё 8 примеров свернуть

Примеры, ожидающие перевода

The car sped away with the police in hot pursuit.

Ronnie sped off, with his brother’s car following close behind.

As the car sped down the dirt road, it left a cloud of dust behind.

Для того чтобы добавить вариант перевода, кликните по иконке , напротив примера.

Возможные однокоренные слова

oversped  — завышенная, чрезмерная скорость, ехать с превышением скорости

скорость, быстрота, число оборотов, спид, ускорять, торопить, спешить

существительное

- скорость; быстрота, темп; скорость хода

- физ. скорость

escape speed — вторая космическая скорость
sonic speed — звуковая скорость (движения)
sound speed — скорость (распространения) звука
supersonic speed — сверхзвуковая скорость
subsonic speed — дозвуковая скорость

- тех. число оборотов
- авт. передача

first [second] speed — а) первая [вторая] передача; б) скорость на первой [второй] передаче; to put in the first [the second] speed

- спец. быстродействие, скорость работы
- фото светосила (объектива); светочувствительность (плёнки)
- арх. успех, удача; выгода

to wish good speed — желать успеха /удачи/
more haste, less speed — ≅ тише едешь, дальше будешь

- «спид» (наркотик из группы стимуляторов)

глагол

- быстро проходить, проноситься; быстро пролетать, мчаться

to speed off /away/ — поспешно удалиться; поспешить прочь
to speed away back to town — умчаться обратно в город
an arrow sped past — мимо пролетела стрела
the car sped along the road — машина мчалась по дороге
the years sped by — проносились годы, быстро летели годы
the news sped swiftly over the country — сообщение быстро облетело всю страну

- превышать дозволенную скорость

he was fined for speeding — его оштрафовали за превышение скорости

- книжн. быстро идти

to speed one’s way somewhere — поспешно направляться /спешить/ куда-л.
he sped down the street — он быстро шёл по улице

- спешить, торопиться

to speed through a task — а) быстро разделаться с заданием; б) выполнить работу наспех
he took a car and sped to the village — он взял машину и бросился /поспешил/ в деревню

- торопить, поторапливать

to speed one’s horse — погонять лошадь
to speed oneself — торопиться, спешить

ещё 8 вариантов

Мои примеры

Словосочетания

traveling at nearly the speed of light — перемещение почти со скоростью света  
a short burst of speed — резкий набор скорости  
his final, straining burst of speed — его последнее, натужное ускорение  
at (a) breakneck pace / speed — сломя голову, с головокружительной быстротой  
to drive engine up to speed — раскручивать двигатель  
to drop speed — снижать скорость  
to drive the engine up to speed — раскручивать двигатель  
first speed — первая скорость  
at / with lightning speed, like lightning — с быстротой молнии, молниеносно  
speed record — рекорд по скорости  
to ride full speed — скакать во весь опор  
a burst of speed — резкое увеличение скорости  

Примеры с переводом

Keep your speed down.

Придерживайтесь низкой скорости.

He has been speeding.

Он превысил скорость.

Time sped by.

Время быстро пронеслось.

I got a ticket for speeding

Мне выписали штраф за превышение скорости.

May God speed you!

Да поможет вам Бог!

The car ran at full speed.

Машина мчалась на полной скорости.

The train put on speed.

Поезд прибавил скорость.

ещё 23 примера свернуть

Примеры, ожидающие перевода

We fly at a cruising speed of 500 mph.

The car has a maximum speed of 120 mph.

The train was gradually picking up speed.

Для того чтобы добавить вариант перевода, кликните по иконке , напротив примера.

Фразовые глаголы

speed up — ускорять, убыстрять, увеличивать

Возможные однокоренные слова

speeder  — повышающее устройство, ровничная машина, скоростной автомобиль
speedily  — быстро, поспешно
speeding  — езда на большой скорости, езда с недозволенной скоростью
speedy  — быстрый, скорый, поспешный, безотлагательный, проворный
overspeed  — завышенная, чрезмерная скорость, ехать с превышением скорости

Формы слова

verb
I/you/we/they: speed
he/she/it: speeds
ing ф. (present participle): speeding
2-я ф. (past tense): sped or speeded
3-я ф. (past participle): sped or speeded

noun
ед. ч.(singular): speed
мн. ч.(plural): speeds

1

a

: rate of motion: such as

(2)

: the magnitude of a velocity irrespective of direction

b

: the act or state of moving swiftly : swiftness

3

a

: the sensitivity of a photographic film, plate, or paper expressed numerically

b

: the time during which a camera shutter is open

c

: the light-gathering power of a lens or optical system

4

: a transmission gear in automotive vehicles or bicycles

usually used in combination

5

: someone or something that appeals to one’s taste

6

: methamphetamine

also

: a related stimulant drug and especially an amphetamine

7

archaic

: prosperity in an undertaking : success

intransitive verb

1

b

: to go or drive at excessive or illegal speed

2

: to move, work, or take place faster : accelerate

3

a

archaic

: to prosper in an undertaking

transitive verb

1

a

: to cause to move quickly : hasten

2

a

: to further the success of

b

archaic

: to cause or help to prosper : aid

Phrases

at speed

up to speed

: operating at full effectiveness or potential

Synonyms

Choose the Right Synonym for speed

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

Example Sentences

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.



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



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

Verb



A group of kids sped past us on their bikes.



They jumped in the car and sped away.



A car was speeding down the street.



An ambulance sped her to the hospital.



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

See More

Recent Examples on the Web



After blending on medium speed for 30 seconds, strain with a fine strainer.


Jason O’bryan, Robb Report, 8 Apr. 2023





One thing is faster charging speeds.


Rob Nikolewski, San Diego Union-Tribune, 7 Apr. 2023





As the transition from gasoline-powered to all-electric speeds up, one of the roughly 150,000 unionized auto jobs nationwide that could be lost might belong to Steve Noffke, who has built internal combustion engines for Ford for 25 years.


Coral Davenport, New York Times, 7 Apr. 2023





April 7, 2023 Looking for more clubhead speed without risking injury?


WSJ, 7 Apr. 2023





Its speed fluctuated as its locked steel wheels ground along the tracks, beginning to deform and lose purchase.


Dan Schwartz, Fortune, 7 Apr. 2023





Streaming remains music’s dominant driver with acts from all over the world hitting the top of the charts with milestone numbers — and in record speed.


Thania Garcia, Variety, 7 Apr. 2023





Smitherman’s bill defines terms like speed contests, burnouts, and donuts.


Mike Cason | Mcason@al.com, al, 7 Apr. 2023





First, there doesn’t appear to be much speed in the Blue Grass, which could compromise his late-running style.


Jason Frakes, The Courier-Journal, 7 Apr. 2023




The clock has sped things up, but there have been some glitches.


ABC News, 9 Apr. 2023





Major League Baseball is implementing some of the biggest changes in the sport’s history in an effort to speed up the game and inject more activity.


Tyler Kepner Hilary Swift, New York Times, 7 Apr. 2023





Others are reading:Four Central Indiana people killed in small Florida plane crash More:After his son was killed, an Indianapolis dad went to crime scenes hoping to help others A surveillance camera captured a silver car speeding away from the scene of the deadly gunfire.


Jake Allen, The Indianapolis Star, 6 Apr. 2023





The girl ran from him and told her family while Eduard fled the store and sped away in a green Kia Soul, police said.


Nathan Solis, Los Angeles Times, 30 Mar. 2023





Use Next and Previous buttons to navigate A man accused of speeding away after fatally striking a pedestrian with his truck shortly after midnight today has been arrested.


Jacob Beltran, San Antonio Express-News, 29 Mar. 2023





The Mercedes carrying him managed to speed away, India’s Tribune News Service reported, citing a police affidavit.


Yashraj Sharma, NBC News, 28 Mar. 2023





Officers were told a light-colored vehicle — possibly white or silver — was seen in the area and sped away after the shooting.


Karen Kucher, San Diego Union-Tribune, 27 Mar. 2023





Their home surveillance footage captured two cars speeding away from the bar at that time.


The Oregonian/oregonlive, oregonlive, 24 Mar. 2023



See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word ‘speed.’ Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Noun

Middle English sped, speede, spede «luck, fortune, good fortune, success, assistance, benefit, rate of motion or progress,» going back to Old English spēd «luck, success, riches, opportunity, power,» spēdum (dative plural used adverbially) «swiftly,» going back to West Germanic *spōdi- (whence also Old Saxon spōd «success, advantage,» Middle Dutch spoed «prosperity, progress, haste,» Old High German spuot «quickness, velocity»), derivative with the abstract noun suffix -ti- from the base of *spōan- «to succeed» (whence Old English spōwan «to succeed, thrive» [Class 7 strong verb], Middle Dutch spoen «to strive,» Old High German spuoen «to succeed»), going back to an o-grade derivative of the Indo-European verbal base *speh1 «thrive, prosper», whence also Old Church Slavic spějǫ, spěti «to have success,» Lithuanian spė́ju, spė́ti «to manage (to do something),» Sanskrit sphā́yate «(s/he) grows fat, increases,» Hittite išpāi «(s/he) gets full, is satiated»; as nominal derivatives Latin spēs «hope» (< *speh1), Latin prosperus «agreeable to one’s wishes, successful, prosperous,» Old Russian sporŭ «abundant,» Sanskrit sphiráḥ «fat» (< *sph1-ró-)

Verb

Middle English speden «to succeed, fare, assist, travel swiftly,» going back to Old English spēdan, gespēdan «to have success, succeed, prosper,» verbal derivative of spēd «luck, success» — more at speed entry 1

Note:
Parallel Germanic formations are Old Saxon spōdian «to further, promote» and Old High German gispuoten «to make thrive.»

First Known Use

Noun

before the 12th century, in the meaning defined at sense 7

Verb

before the 12th century, in the meaning defined at intransitive sense 3a

Time Traveler

The first known use of speed was
before the 12th century

Dictionary Entries Near speed

Cite this Entry

“Speed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/speed. Accessed 14 Apr. 2023.

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10 Apr 2023
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This shows grade level based on the word’s complexity.


noun

rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity: the speed of light;the speed of sound.

relative rapidity in moving, going, etc.; rate of motion or progress: full speed ahead.

full, maximum, or optimum rate of motion: The car gets to speed in just nine seconds.

Photography.

  1. Also called film speed . the sensitivity of a film or paper to light, measured by an ASA or DIN index, which assigns low numbers to slow film and higher numbers to faster film.
  2. Also called shutter speed . the length of time a shutter is opened to expose the film or digital sensor inside the camera to light.
  3. the largest opening at which a lens can be used.

Slang. a stimulating drug, as caffeine, ephedrine, or especially methamphetamine or amphetamine.

Informal. a person or thing that is compatible with or typical of one’s ability, personality, desires, etc.: My speed is writing postcards on the porch while everyone else is tearing around the tennis court.

Archaic. success or prosperity.

verb (used with object), sped [sped] /spɛd/ or speed·ed, speed·ing.

to promote the success of (an affair, undertaking, etc.); further, forward, or expedite.

to direct (the steps, course, way, etc.) with speed.

to increase the rate of speed of (usually followed by up): to speed up industrial production.

to bring to a particular speed, as a machine.

to cause to move, go, or proceed with speed.

to expedite the going of: to speed the parting guest.

Archaic. to cause to succeed or prosper.

verb (used without object), sped [sped] /spɛd/ or speed·ed, speed·ing.

to move, go, pass, or proceed with speed or rapidity.

to drive a vehicle at a rate that exceeds the legally established maximum: He was arrested for speeding.

to increase the rate of speed or progress (usually followed by up).

to get on or fare in a specified or particular manner.

Archaic. to succeed or prosper.

QUIZ

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Idioms about speed

    at full / top speed,

    1. at the greatest speed possible: We drove down the highway at full speed.
    2. to the maximum of one’s capabilities; with great rapidity: He worked at full speed.

    up to speed,

    1. operating at full or optimum speed.
    2. functioning or producing at an expected, acceptable, or competitive level; up to par: a new firm not yet up to speed.

Origin of speed

First recorded before 900; 1965–70 for def. 6; (noun) Middle English spede “good luck, prosperity, rapidity,” Old English spēd; cognate with Dutch spoed, Old High German spōt; akin to Old English spōwan “to prosper, succeed”; (verb) Middle English speden “to succeed, prosper, go with speed,” Old English spēdan “to succeed, prosper”; cognate with Old Saxon spōdian, Old High German spuoten

synonym study for speed

1, 2. Speed, velocity, quickness, rapidity, celerity, haste refer to swift or energetic movement or operation. Speed (originally prosperity or success) may apply to human or nonhuman activity and emphasizes the rate in time at which something travels or operates: the speed of light, of a lens, of an automobile, of thought. Velocity, a more learned or technical term, is sometimes interchangeable with speed : the velocity of light; it is commonly used to refer to high rates of speed, linear or circular: velocity of a projectile. Quickness, a native word, and rapidity, a synonym of Latin origin, suggest speed of movement or operation on a small or subordinate scale; quickness applies more to people ( quickness of mind, of perception, of bodily movement ), rapidity more to things, often in a technical or mechanical context: the rapidity of moving parts; a lens of great rapidity. Celerity, a somewhat literary synonym of Latin origin, refers usually to human movement or operation and emphasizes expedition, dispatch, or economy in an activity: the celerity of his response. Haste refers to the energetic activity of human beings under stress; it often suggests lack of opportunity for care or thought: to marry in haste; a report prepared in haste. 16. See rush1.

OTHER WORDS FROM speed

speedful, adjectivespeed·ful·ly, adverbspeed·ful·ness, nounspeed·ing·ly, adverb

speed·ing·ness, nounspeedless, adjectivemul·ti·speed, adjectiveoutspeed, verb (used with object), out·sped or out·speed·ed, out·speed·ing.o·ver·speed, verb, o·ver·sped or o·ver·speed·ed, o·ver·speed·ing.

Words nearby speed

speech synthesis, speech therapy, speech-to-text, speechway, speechwriter, speed, speedball, speedboat, speedboating, speed brake, speed bump

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Words related to speed

acceleration, agility, momentum, pace, quickness, velocity, advance, boost, expedite, facilitate, fly, further, hasten, help, hurry, promote, quicken, ride, run, rush

How to use speed in a sentence

  • Since then, total hours worked have rebounded at exactly the same speed.

  • The discovery of this phenomenon, which theorists called universality, was as bizarre as finding that elephants and egrets move at precisely the same top speed.

  • Added to which, a page that’s been properly optimized for speed might not need AMP for those speed gains, as well.

  • You can coach sharpness within speeds, so that means how you start, how you push off and how you maintain your sprint speed by the technique that you use.

  • As the next flare runs into the protons released by the previous flare, it would accelerate protons and electrons in the same direction at the same speeds.

  • Term limits could be a prescription to speed change along.

  • He felt his body grow limp (like one of those high-speed films of a flower wilting).

  • The jet engine instantly brought two advances over propellers: it doubled the speed and it was far more reliable.

  • One report has the AirAsia Airbus flying at a speed very close to what would trigger a low speed stall.

  • Authorities blame anarchists protesting a proposed high-speed rail line called TAV that will link Turin and Lyon, France.

  • Really, he had made astonishing speed for one who had tunnelled his way underp.

  • A long stretch of smooth ice followed, over which he glided with ever-increasing speed.

  • Never again would he sit behind that wheel rejoicing in the insolence of speed.

  • In fact, his appearance was so formidable that Davy did not pause for a second look, but started off at the top of his speed.

  • And the girl, scarce believing her good fortune, departed with a speed that bordered on the ludicrous.

British Dictionary definitions for speed


noun

the act or quality of acting or moving fast; rapidity

the rate at which something moves, is done, or acts

physics 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). It is measured in metres per second, miles per hour, etc

a rate of rotation, usually expressed in revolutions per unit time

  1. a gear ratio in a motor vehicle, bicycle, etc
  2. (in combination)a three-speed gear

photog a numerical expression of the sensitivity to light of a particular type of film, paper, or plateSee also ISO rating

photog a measure of the ability of a lens to pass light from an object to the image position, determined by the aperture and also the transmitting power of the lens. It increases as the f-number is decreased and vice versa

archaic prosperity or success

at speed quickly

up to speed

  1. operating at an acceptable or competitive level
  2. in possession of all the relevant or necessary information

verb speeds, speeding, sped or speeded

to move or go or cause to move or go quickly

(intr) to drive (a motor vehicle) at a high speed, esp above legal limits

(tr) to help further the success or completion of

(intr) slang to take or be under the influence of amphetamines

(intr) to operate or run at a high speed

archaic

  1. (intr) to prosper or succeed
  2. (tr) to wish success to

Derived forms of speed

speeder, noun

Word Origin for speed

Old English spēd (originally in the sense: success); related to spōwan to succeed, Latin spēs hope, Old Slavonic spěti to be lucky

Collins English Dictionary — Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for speed


The ratio of the distance traveled by an object (regardless of its direction) to the time required to travel that distance. Compare velocity.

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Other Idioms and Phrases with speed


In addition to the idiom beginning with speed

  • speed up

also see:

  • full speed ahead
  • up to par (speed)

The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

speed

 (spēd)

n.

1. Physics The rate or a measure of the rate of motion, especially:

a. Distance traveled divided by the time of travel.

b. The limit of this quotient as the time of travel becomes vanishingly small; the first derivative of distance with respect to time.

c. The magnitude of a velocity.

2. Swiftness of action: He wrote the first chapter with great speed.

3.

a. The act of moving rapidly: finished the race in a burst of speed.

b. The state of being in rapid motion; rapidity: The river’s speed made a rescue difficult.

4. A transmission gear or set of gears in a motor vehicle: What speed is the car in now?

5.

a. A numerical expression of the sensitivity of a photographic film, plate, or paper to light.

b. The capacity of a lens to accumulate light at an appropriate aperture.

c. The length of time required or permitted for a camera shutter to open and admit light.

6. Slang A stimulant drug, especially amphetamine or methamphetamine.

7. Slang One that suits or appeals to a person’s inclinations, skills, or character: Living in a large city is not my speed.

8. Archaic Prosperity; luck.

v. sped (spĕd) or speed·ed, speed·ing, speeds

v.intr.

1.

a. To go, move, or proceed quickly: sped to the rescue.

b. To drive at a speed exceeding a legal limit: was speeding on the freeway.

2. To pass quickly: The days sped by. The months have sped along.

3. To move, work, or happen at a faster rate; accelerate: His pulse speeded up.

4. Slang To be under the influence of a stimulant drug.

5. Archaic

a. To prove successful; prosper.

b. To get along in a specified manner; fare.

v.tr.

1. To cause to move or proceed quickly; hasten: no wind to speed the boat.

2. To increase the speed or rate of; accelerate. Often used with up: speed up a car; sped up production.

3. To further, promote, or expedite (a legal action, for example).

4. Archaic To help to succeed or prosper; aid.

Idioms:

at speed

At high speed: added a spoiler to the car to reduce lift when operating at speed.

up to speed

1. Operating at maximum speed. Producing something or performing at an acceptable rate or level.

2. Informal Fully informed; conversant: I’m not up to speed on these issues yet.


[Middle English spede, from Old English spēd, success, swiftness; see spē- in Indo-European roots.]

Synonyms: speed, hurry, hasten, quicken, accelerate
These verbs mean to proceed or cause to proceed rapidly or more rapidly. Speed refers to swift motion or action: The train sped through the countryside. Postal workers labored overtime to speed delivery of the holiday mail. Hurry implies a markedly faster rate than usual, often with concomitant confusion or commotion: Hurry, or you’ll miss the plane! Don’t let anyone hurry you into making a decision. Hasten suggests urgency and often eager or rash swiftness: My doctor hastened to reassure me that the tests were negative. His off-color jokes only hastened his dismissal. Quicken and especially accelerate refer to increase in rate of activity, growth, or progress: The skater’s breathing quickened as he neared the end of his routine. The runner quickened her pace as she drew near the finish line. The economic expansion has continued but is no longer accelerating. Heat greatly accelerates the deterioration of perishable foods. See Also Synonyms at haste.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

speed

(spiːd)

n

1. the act or quality of acting or moving fast; rapidity

2. the rate at which something moves, is done, or acts

3. (General Physics) physics 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). It is measured in metres per second, miles per hour, etc

4. (Mechanical Engineering) a rate of rotation, usually expressed in revolutions per unit time

5. (Mechanical Engineering)

a. a gear ratio in a motor vehicle, bicycle, etc

b. (in combination): a three-speed gear.

6. (Photography) photog a numerical expression of the sensitivity to light of a particular type of film, paper, or plate. See also ISO rating

7. (Photography) photog a measure of the ability of a lens to pass light from an object to the image position, determined by the aperture and also the transmitting power of the lens. It increases as the f-number is decreased and vice versa

8. (Recreational Drugs) a slang word for amphetamine

9. archaic prosperity or success

10. at speed quickly

11. up to speed

a. operating at an acceptable or competitive level

b. in possession of all the relevant or necessary information

vb, speeds, speeding, sped or speeded

12. to move or go or cause to move or go quickly

13. (Law) (intr) to drive (a motor vehicle) at a high speed, esp above legal limits

14. (Automotive Engineering) (intr) to drive (a motor vehicle) at a high speed, esp above legal limits

15. (tr) to help further the success or completion of

16. (Recreational Drugs) (intr) slang to take or be under the influence of amphetamines

17. (Mechanical Engineering) (intr) to operate or run at a high speed

18. archaic

a. (intr) to prosper or succeed

b. (tr) to wish success to

[Old English spēd (originally in the sense: success); related to spōwan to succeed, Latin spēs hope, Old Slavonic spěti to be lucky]

ˈspeeder n

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

speed

(spid)

n., v. sped speed•ed, speed•ing. n.

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.

c. the largest opening at which a lens can be used.

5. Slang. a stimulating drug, esp. methamphetamine or amphetamine.

6. a person, thing, activity, etc., that suits one’s ability, inclinations, or personality: Quiet, easygoing people are more my speed.

7. Archaic. success or prosperity.

v.t.

8. to promote the success of; further, forward, or expedite.

9. to direct (the course, way, etc.) with speed.

10. to increase the rate of speed of (usu. fol. by up): to speed up production.

11. to cause to move or go with speed.

12. Archaic. to cause to succeed or prosper.

v.i.

13. to go or proceed with rapidity.

14. to drive a vehicle at a rate that exceeds the legal limit.

15. to increase the rate of speed (usu. fol. by up).

16. to get on or fare in a specified or particular manner.

17. Archaic. to succeed or prosper.

Idioms:

1. at full or top speed,

a. at the greatest speed possible.

b. to the maximum of one’s capabilities.

2. up to speed,

a. operating at full or optimum speed.

b. functioning at an anticipated or competitive level: a new firm not yet up to speed.

[before 900; (n.) Middle English spede good luck, prosperity, rapidity, Old English spēd, c. Old Saxon spōd, Old High German spuot]

speed′er, n.

syn: speed, velocity, celerity refer to swift or energetic movement or operation. speed may apply to human or nonhuman activity; it emphasizes the rate in time at which something travels or operates: the speed of an automobile; the speed of thought. velocity, a more technical term, is commonly used to refer to high rates of speed: the velocity of a projectile. celerity, a somewhat literary term, usu. refers to human movement or operation, and emphasizes dispatch or economy in an activity: the celerity of his response.

Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Speed

 

See Also: RUNNING

  1. (Poems have become) as instant as coffee or onion soup mix —Donald Hall
  2. (They’ll whip her back … ) as quick as shit through a goose —Derek Lambert
  3. As swift as meditation, or the thoughts of love —William Shakespeare
  4. As swiftly as a reach of still water is crisped by the wind —Rudyard Kipling
  5. Be not in a hurry, like the almond, first to blossom and last to ripen. Be rather like the mulberry, last to blossom and first to ripen —The Holy Bible/Apocrypha
  6. The crowd was moving fast … like a big spread ravelling, and the separate threads disappeared down the dark street —Flannery O’Connor
  7. Drive [a car] like the hounds of hell —Rosamund Pilcher
  8. Fast as a bird on the wing —Anon
  9. Fast as a cat scurrying up a tree at the approach of a strange dog —Anon
  10. Fast as a cook cracks eggs —Thomas Nash
  11. Fast as a heartbeat —John D. MacDonald
  12. Fast as a jet —Mark Helprin
  13. Fast as a pickpocket —Anon
  14. Fast as a propeller —Bertold Brecht
  15. (Scrambles into the room,) fast as a spider —Robert Silverberg
  16. Fast as greased lightning —American colloquialism
  17. Fast as the blink of an eye —Anon
  18. Fast-moving as the gray fox that climbs trees after squirrels —Marge Piercy
  19. (Little and) fleet as a terrier running beside a bloodhound —Erich Maria Remarque
  20. (To vanish,) fleet as days and months and years, fleet as the generations of mankind —William Wordsworth
  21. Flying like ice in a sleet storm —Ben Ames Williams
  22. Fly like a donkey with pepper up its behind —Aharon Megged
  23. Galloped through [religious mass] like a man with witches after him —Edith Wharton
  24. Goes like a ship-lash flicked across a horse’s neck —Rudyard Kipling
  25. Going like flames —Samuel Beckett
  26. Going like sixty —F. D. Reeve
  27. Go like a house afire —Anon

    One of many “Go like” similes that have worked their way into the American language mainstream since the late 1830s. Some other examples: “Go like a shot,” “Go like hell” and “Go like mad.”

  28. Go through like a dose of salts —American colloquialism

    While purgative salts are pretty much a thing of the past, the simile endures as a way to describe a very rapid pace. With the penchant for brand names, “Go through like Ex-Lax” has become a common alternative.

  29. Go through them [reading materials] like a kid through potato chips —James Crumley
  30. He rushed past her like a football tackle —James Thurber
  31. (Wedding plans were) hurtling along like a train on tracks —Paul Reidinger
  32. Insectlike swiftness —Saul Bellow
  33. It must be done like lightning —Ben Jonson
  34. Just a glance, like passing your eyes over the spines of books without being able to read the title … that quick —Arthur A. Cohen

    See Also: LOOKS

  35. (Scurried off, his) legs going like a windmill —Paige Mitchell

    See Also: MOVEMENT

  36. Like a sunbeam, swift and bright —Sir Walter Scott
  37. Move with the speed of a Grand Prix Racer —Anon
  38. Moving fast as a train —Anon
  39. My days are swifter than a weaver’s shuttle —The Holy Bible/Job

    While this simile is not much used these days, it is the one that has seeded the many contemporary variations.

  40. Quick and nimble, more like a bear than a squirrel —Henry G. Bohn’s Handbook of Proverbs
  41. Quick as a lizard —Anthony Trollope
  42. Quick as an attack dog —Gloria Norris
  43. (Acted) quick as a knife —Penelope Gilliatt
  44. (The wolf … ate her up as) quick as a slap —Anne Sexton
  45. Quick as a striking snake —George Garrett
  46. Quick as a weasel —Robert B. Parker
  47. Quick as a wink —Anon

    While variations such as “Quick as dust” and “Quick as scat” have faded from the American vocabulary, “Quick as a wink” endures to the point of overuse.

  48. (Goes) quick as light —Noël Coward, lyrics for “Chase Me Charlie”
  49. Quick as lightning —Frances Sheridan

    The American adaption of the simile first used by Sheridan in a play named Discovery is “Quick as greased lightning.”

  50. Quick as mercury —Marguerite Yourcenar
  51. (Slipped down) quick as minnows —Marge Piercy
  52. (Barry’s eye was as) quick as sound —Frank Swinnerton
  53. Quicker than a crab underwater —John Updike
  54. Quicker than boiling asparagus —Caesar Augustus

    According to Stevenson’s Proverbs, Maxims and Famous Sayings, Augustus used this expression whenever he wanted anything to be done fast.

  55. Quick on his feet as a running deer —Stephen Vincent Benét
  56. (Lavella’s brain) raced like a trapped rabbit —William Beechcroft
  57. (Feet) rapid as the river —Henry Wadsworth Longfellow
  58. Rash as fire —William Shakespeare
  59. (Raleigh) rushed through (these hypotheses) like rosary beads —Michael Malone
  60. (Men) rushing like they were bolt out of a cannon —Richard Ford
  61. Rushing wildly from room to room like a flustered hen —Christopher Isherwood
  62. Scurried like a crab —Michael Malone
  63. She was so swift … it was like having a small cute dog with you —Isak Dinesen
  64. Some people are too fast for their own good, like Asahel in the Book of Samuel —Saul Bellow
  65. Sped around like intergalactic missiles —Lisa Harris

    Harris’s simile describes the activity of the Lubavitcher women in Crown Heights, the subject of her book The World of a Hasidic Family.

  66. (The game) speeds along like a fast freight —W. P. Kinsella

    The game speeding along is baseball, the background for The Iowa Baseball Confederacy and other Kinsella novels.

  67. Speedy as a steam roller —George Ade
  68. Started for me (as to attack) like a streak of lightning —Rex Stout
  69. Swift as a cloud between sea and sky —Percy Bysshe Shelley
  70. Swift as a greyhound —Ouida
  71. Swift as a mugger —David Leavitt
  72. Swift as an arrow —Anon

    This has been attributed to numerous sources dating back to the early seventeenth century.

  73. Swift as a plunging knife —Rudyard Kipling
  74. Swift as a shadow —William Shakespeare
  75. Swift as desire —Mary Pix
  76. Swift as fear —Thomas Parnell
  77. Swift as the eagle (flieth) —The Holy Bible/Deuteronomy
  78. Swift as the waters —The Holy Bible/Job
  79. Swift as thought —William Shakespeare
  80. Swift as unbridled rage —Henry Abbey
  81. Swifter than the wind —William Shakespeare
  82. Swift in motion as a ball —William Shakespeare
  83. (Fluttering her bristly black lashes as) swiftly as butterflies’ wings —Margaret Mitchell

    The girl fluttering her lashes is Scarlett O’Hara of Gone with the Wind fame.

  84. Travelling fast as a wish —Elizabeth Bishop
  85. (The race) went by like an express train —Enid Bagnold
  86. (She dressed and) went off like a top with the whip behind it —Vicki Baum
  87. Went past … like lightning past a hill —Jessamyn West
  88. Went through it like a clown through a paper hoop —Temole Scott
  89. Went through like shit through a tin horn —American colloquialism

Similes Dictionary, 1st Edition. © 1988 The Gale Group, Inc. All rights reserved.

speed

Fast, quick, rapid, and swift are all used to say taht something moves or happens with great speed. Rapid and swift are not usually used in conversation.

Fast is used both as an adjective and an adverb. There is no adverb ‘fastly’.

fast communications.

I ran as fast as I could.

1. ‘quick’

Quick is an adjective. You do not usually used it as an adverb. Instead you use the adverb quickly.

It is this muscle which gives us our quick, springing movements.

I walked quickly up the passage.

In conversation, you can use the comparative form quicker as an adverb.

I swam on a bit quicker.

Goats could ruin a farmer’s field quicker than baboons.

He began to speak more quickly.

You can use the superlative form quickest as an adverb in speech or writing.

…and Freedman reacted quickest to head the ball into the net.

2. ‘rapid’ and ‘swift’

Rapid and swift are adjectives. The corresponding adverbs are rapidly and swiftly.

Jobs tend to be plentiful at a time of rapid economic growth.

They walked rapidly past the churchyard.

…a swift decision.

He walked swiftly towards home.

3. asking about speed

Fast is the word you usually use when you are asking about the speed of something.

How fast is the fish swimming?

…looking out of the window to see how fast we were going.

4. vehicles

You use fast to say that a vehicle is capable of moving with great speed.

…a fastcar.

5. people

You do not usually use fast to talk about people, but you can use it in front of words like driver and runner to say that someone drives quickly or is capable of running quickly.

Not being a fast runner, I was glad I had parked close to the hall.

6. changes

When you are talking about the speed at which something increases or decreases, you usually use rapid.

People are worried about the rapid and massive increase in military spending.

7. no delay

Fast, immediate, quick, rapid, and swift are all used to say that something happens without any delay.

I only got a fast return on my investment once.

My immediate reaction was just disgust.

They are pressing for a quick resumption of arms negotiations.

… managers plagued by demands for rapid decisions.

The response was swift and intense.

8. short duration

You can use quick, rapid, or swift to say that something lasts only a short time.

…a quick visit.

You are likely to make a rapid recovery.

…the swift descent from tentility to near-poverty.


speed

speed up

Speed can be a noun or a verb.

1. used as a noun

The speed of someone or something is the rate at which they move.

He increased his speed to 115mph.

…the speed of light.

Speed is often used in prepositional phrases beginning with at or with.

You can say that someone or something moves at a particular speed.

He goes on driving at the same speed.

The bullets hit Ilie Popescu at a speed of 1,350 feet per second.

If you want to emphasize how fast something is moving, you can use at and an adjective in front of speed.

I drove at great speed to West Bank.

A plane flew low over the ship at lightning speed.

If you want to emphasize how quickly something happens or is done, you use with and an adjective in front of speed.

The shape of their bodies changes with astonishing speed.

They have succeeded in expanding their industries with remarkable speed.

2. used as a verb

In stories, if someone speeds somewhere, they move or travel there quickly. When speed has this meaning, its past tense and past participle is sped.

They sped along Main Street towards the highway.

They drove through Port Philip and sped on down south.

3. ‘speed up’

If something speeds up or if you speed it up, it moves, happens, or is done more quickly.

They’re way ahead of us. Speed up!

The past tense and past participle of speed up is speeded up.

Tom speeded up and overtook them.

The process is now being speeded up.

Collins COBUILD English Usage © HarperCollins Publishers 1992, 2004, 2011, 2012

speed

Past participle: speeded/sped
Gerund: speeding

Imperative
speed
speed
Present
I speed
you speed
he/she/it speeds
we speed
you speed
they speed
Preterite
I speeded/sped
you speeded/sped
he/she/it speeded/sped
we speeded/sped
you speeded/sped
they speeded/sped
Present Continuous
I am speeding
you are speeding
he/she/it is speeding
we are speeding
you are speeding
they are speeding
Present Perfect
I have speeded/sped
you have speeded/sped
he/she/it has speeded/sped
we have speeded/sped
you have speeded/sped
they have speeded/sped
Past Continuous
I was speeding
you were speeding
he/she/it was speeding
we were speeding
you were speeding
they were speeding
Past Perfect
I had speeded/sped
you had speeded/sped
he/she/it had speeded/sped
we had speeded/sped
you had speeded/sped
they had speeded/sped
Future
I will speed
you will speed
he/she/it will speed
we will speed
you will speed
they will speed
Future Perfect
I will have speeded/sped
you will have speeded/sped
he/she/it will have speeded/sped
we will have speeded/sped
you will have speeded/sped
they will have speeded/sped
Future Continuous
I will be speeding
you will be speeding
he/she/it will be speeding
we will be speeding
you will be speeding
they will be speeding
Present Perfect Continuous
I have been speeding
you have been speeding
he/she/it has been speeding
we have been speeding
you have been speeding
they have been speeding
Future Perfect Continuous
I will have been speeding
you will have been speeding
he/she/it will have been speeding
we will have been speeding
you will have been speeding
they will have been speeding
Past Perfect Continuous
I had been speeding
you had been speeding
he/she/it had been speeding
we had been speeding
you had been speeding
they had been speeding
Conditional
I would speed
you would speed
he/she/it would speed
we would speed
you would speed
they would speed
Past Conditional
I would have speeded/sped
you would have speeded/sped
he/she/it would have speeded/sped
we would have speeded/sped
you would have speeded/sped
they would have speeded/sped

Collins English Verb Tables © HarperCollins Publishers 2011

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun 1. speed - distance travelled per unit timespeed — distance travelled per unit time  

velocity

angular velocity — (physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute

airspeed — the speed of an aircraft relative to the air in which it is flying

escape velocity — the minimum velocity needed to escape a gravitational field

groundspeed — the speed of an aircraft relative to the ground

hypervelocity — excessive velocity; «the meteorites struck the earth with hypervelocity impacts»

muzzle velocity — the velocity of a projectile as it leaves the muzzle of a gun

peculiar velocity — velocity with respect to the local standard of rest

radial velocity — velocity along the line of sight toward or away from the observer

light speed, speed of light, c — the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second

steerageway — (nautical) the minimum rate of motion needed for a vessel to be maneuvered

terminal velocity — the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity

rate — a magnitude or frequency relative to a time unit; «they traveled at a rate of 55 miles per hour»; «the rate of change was faster than expected»

2. speed — a rate (usually rapid) at which something happens; «the project advanced with gratifying speed»

fastness, swiftness

pace, rate — the relative speed of progress or change; «he lived at a fast pace»; «he works at a great rate»; «the pace of events accelerated»

haste, hastiness, hurriedness, hurry, precipitation — overly eager speed (and possible carelessness); «he soon regretted his haste»

execution speed — (computer science) the speed with which a computational device can execute instructions; measured in MIPS

graduality, gradualness — the quality of being gradual or of coming about by gradual stages

3. speed - changing location rapidlyspeed — changing location rapidly    

hurrying, speeding

movement, move, motion — the act of changing location from one place to another; «police controlled the motion of the crowd»; «the movement of people from the farms to the cities»; «his move put him directly in my path»

speedup, acceleration, quickening — the act of accelerating; increasing the speed

deceleration — the act of decelerating; decreasing the speed; «he initiated deceleration by braking»

scud, scudding — the act of moving along swiftly (as before a gale)

4. speed — the ratio of the focal length to the diameter of a (camera) lens system

f number, focal ratio, stop number

ratio — the relative magnitudes of two quantities (usually expressed as a quotient)

5. speed - a central nervous system stimulant that increases energy and decreases appetitespeed — a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

amphetamine, pep pill, upper

amphetamine sulfate, amphetamine sulphate — a sulfate derivative of amphetamine that is used as a stimulant for the central nervous system

bennie, Benzedrine — a form of amphetamine

Dexedrine, dextroamphetamine sulphate — an isomer of amphetamine (trade name Dexedrine) used as a central nervous system stimulant

drug of abuse, street drug — a drug that is taken for nonmedicinal reasons (usually for mind-altering effects); drug abuse can lead to physical and mental damage and (with some substances) dependence and addiction

deoxyephedrine, meth, methamphetamine, methamphetamine hydrochloride, Methedrine, shabu, chicken feed, crank, chalk, trash, glass, ice — an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant

excitant, stimulant drug, stimulant — a drug that temporarily quickens some vital process

Verb 1. speed - move fastspeed — move fast; «He rushed down the hall to receive his guests»; «The cars raced down the street»

belt along, bucket along, cannonball along, hie, hotfoot, pelt along, race, rush, rush along, step on it, hasten

go, locomote, move, travel — change location; move, travel, or proceed, also metaphorically; «How fast does your new car go?»; «We travelled from Rome to Naples by bus»; «The policemen went from door to door looking for the suspect»; «The soldiers moved towards the city in an attempt to take it before night fell»; «news travelled fast»

barge, push forward, thrust ahead — push one’s way; «she barged into the meeting room»

shoot down, tear, buck, charge, shoot — move quickly and violently; «The car tore down the street»; «He came charging into my office»

dash, scoot, scud, dart, flash, shoot — run or move very quickly or hastily; «She dashed into the yard»

accelerate, quicken, speed up, speed — move faster; «The car accelerated»

2. speed - move fasterspeed — move faster; «The car accelerated»  

accelerate, quicken, speed up

brisk, brisk up, brisken — become brisk; «business brisked up»

deepen, intensify — become more intense; «The debate intensified»; «His dislike for raw fish only deepened in Japan»

3. speed - move very fastspeed — move very fast; «The runner zipped past us at breakneck speed»

hurry, travel rapidly, zip

go, locomote, move, travel — change location; move, travel, or proceed, also metaphorically; «How fast does your new car go?»; «We travelled from Rome to Naples by bus»; «The policemen went from door to door looking for the suspect»; «The soldiers moved towards the city in an attempt to take it before night fell»; «news travelled fast»

dart, fleet, flit, flutter — move along rapidly and lightly; skim or dart; «The hummingbird flitted among the branches»

run — move fast by using one’s feet, with one foot off the ground at any given time; «Don’t run—you’ll be out of breath»; «The children ran to the store»

whizz along, zoom, zoom along, whizz — move along very quickly

accelerate, quicken, speed up, speed — move faster; «The car accelerated»

4. speed — travel at an excessive or illegal velocity; «I got a ticket for speeding»

go, locomote, move, travel — change location; move, travel, or proceed, also metaphorically; «How fast does your new car go?»; «We travelled from Rome to Naples by bus»; «The policemen went from door to door looking for the suspect»; «The soldiers moved towards the city in an attempt to take it before night fell»; «news travelled fast»

5. speed - cause to move fasterspeed — cause to move faster; «He accelerated the car»

accelerate, speed up

alter, change, modify — cause to change; make different; cause a transformation; «The advent of the automobile may have altered the growth pattern of the city»; «The discussion has changed my thinking about the issue»

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

speed

noun

3. swiftness, rush, hurry, expedition, haste, rapidity, quickness, fleetness, celerity I was amazed at his speed of working.
swiftness slowness, sluggishness, tardiness, delay

verb

1. race, rush, hurry, zoom, career, bomb (along), tear, flash, belt (along) (slang), barrel (along) (informal, chiefly U.S. & Canad.), sprint, gallop, hasten, press on, quicken, lose no time, get a move on (informal), burn rubber (informal), bowl along, put your foot down (informal), step on it (informal), make haste, go hell for leather (informal), exceed the speed limit, go like a bomb (Brit. & N.Z. informal), go like the wind, go like a bat out of hell The engine noise rises only slightly as I speed along.
race creep, crawl, take your time, dawdle, tarry

2. exceed the speed limit, drive too fast, break the speed limit This man was not qualified to drive and was speeding.

3. help, further, advance, aid, promote, boost, assist, facilitate, fast-track, impel, expedite Invest in low-cost language courses to speed your progress.
help slow, delay, hold up, hamper, hinder, retard, slow down

Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

speed

noun

1. Rate of motion or performance:

2. Rapidness of movement or activity:

celerity, dispatch, expedition, expeditiousness, fleetness, haste, hurry, hustle, quickness, rapidity, rapidness, speediness, swiftness.

verb

1. To increase the speed of.Also used with up:

2. To move swiftly:

bolt, bucket, bustle, dart, dash, festinate, flash, fleet, flit, fly, haste, hasten, hurry, hustle, pelt, race, rocket, run, rush, sail, scoot, scour, shoot, sprint, tear, trot, whirl, whisk, whiz, wing, zip, zoom.

Chiefly British: nip.

Idioms: get a move on, get cracking, go like lightning, go like the wind, hotfoot it, make haste, make time, make tracks, run like the wind, shake a leg, step on it.

The American Heritage® Roget’s Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Translations

سرعةسُرْعَةسُرْعَة الحَرَكَهسُرْعَهيُسْرِع

бързина

rychlostuhánětpřekročit povolenou rychlost

hastighedkøre for hurtigtkøre hurtigtfart

nopeuspirispiidivauhti

brzina

sebesség

fara of hrattflÿta; òjótahraîi

速さ

속도

greičio matuoklisgreičio ribojimo gūbrelisgreičio viršijimasviršyti greitį

ātrumsjoņotpārsniegt ātrumutraukties

viteză

prekročiť povolenú rýchlosť

hitrostodbrzetipospešitiprehitro voziti

hastighettjackfart

ความเร็ว

sự nhanh nhẹn

speed

[spiːd] (sped or speeded (vb: pt, pp))

B. VI

2. (speeded (pt, pp)) (Aut) (= exceed speed limit) → conducir or (LAm) manejar por encima del límite de velocidad permitido

speed up (speeded up (pt, pp))

Collins Spanish Dictionary — Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

speed

[ˈspiːd]

vi [sped] [ˈspɛd] (pt, pp)

(AUTOMOBILES) (= exceed speed limit) → être en excès de vitesse

speed up

[speeded up] (pt, pp)

Collins English/French Electronic Resource. © HarperCollins Publishers 2005

speed

vb: pret, ptp <sped or speeded>

n

(Aut, Tech: = gear) → Gang m; three-speed bicycleFahrrad mit Dreigangschaltung; a three-speed gearein Dreiganggetriebe nt

(inf: = drug) → Speed nt (sl)

vt to speed somebody on his way (person) → jdn verabschieden; (iro)jdn hinauskomplimentieren; (good wishes etc) → jdn auf seinem Weg begleiten; if you fetch the visitors’ coats it may speed them on their waywenn du die Mäntel der Gäste holst, machen sie sich vielleicht auf den Weg; God speed you! (old)Gott (sei) mit dir! (old)


speed

:

speed bump

nFahrbahnschwelle f, → Aufpflasterung f (form)

speed cop

n (inf)weiße Maus (inf), → Verkehrsbulle m (inf)


speed

:

speed merchant

n (inf)Raser m (inf); Nicholas is a real speedNicholas fährt wie der Henker (inf)


speed

:

speed ramp

n (Mot) → Bodenschwelle f


speed

:

speed table

n (US Mot) → Bodenschwelle f

speedway

n

(Sport) → Speedwayrennen nt; (= track)Speedwaybahn f

speedwriting

nSchnellschreiben nt

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

speed

[spiːd]

speed up (speeded up (pt, pp))

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

speed

(spiːd) noun

1. rate of moving. a slow speed; The car was travelling at high speed.

2. quickness of moving.

verb

1. (past tense, past participles sped (sped) ˈspeeded) to (cause to) move or progress quickly; to hurry. The car sped/speeded along the motorway.

2. (past tense, past participle ˈspeeded) to drive very fast in a car etc, faster than is allowed by law. The policeman said that I had been speeding.

ˈspeeding noun

driving at (an illegally) high speed. He was fined for speeding.

ˈspeedy adjective

done, carried out etc quickly. a speedy answer.

ˈspeedily adverbˈspeediness nounˈspeed bump noun

a raised part across the road to make drivers slow down.

ˈspeed trap noun

a device used by the police to catch drivers exceeding the speed limit.

speedometer (spiːˈdomitə) noun

an instrument on a car etc showing how fast one is travelling.

speed uppast tense, past participle ˈspeeded

1. to increase speed. The car speeded up as it left the town.

2. to quicken the rate of. We are trying to speed up production.

Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.

speed

سُرْعَة rychlost hastighed Geschwindigkeit ταχύτητα velocidad nopeus vitesse brzina velocità 速さ 속도 snelheid hastighet szybkość velocidade скорость hastighet ความเร็ว hız sự nhanh nhẹn 速度

Multilingual Translator © HarperCollins Publishers 2009

  • What’s the speed limit on this road? (US)
    What is the speed limit on this road? (UK)

Collins Multilingual Translator © HarperCollins Publishers 2009

speed

n (fam) metanfetamina

English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.

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From Wikipedia, the free encyclopedia

This article is about the property of moving bodies. For other uses, see Speed (disambiguation).

Speed
Motorcyclist in Midtown Manhattan-L1002704.jpg

Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a given amount of time, while a slow-moving object covers a relatively small amount of distance in the same amount of time.

Common symbols

v
SI unit m/s, m s−1
Dimension L T−1

In everyday use and in kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.[1] The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval;[2] the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed is not the same as velocity.

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). For air and marine travel, the knot is commonly used.

The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299792458 metres per second (approximately 1079000000 km/h or 671000000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. In relativity physics, the concept of rapidity replaces the classical idea of speed.

Definition

Historical definition

Italian physicist Galileo Galilei is usually credited with being the first to measure speed by considering the distance covered and the time it takes. Galileo defined speed as the distance covered per unit of time.[3] In equation form, that is

v={frac  {d}{t}},

where v is speed, d is distance, and t is time. A cyclist who covers 30 metres in a time of 2 seconds, for example, has a speed of 15 metres per second. Objects in motion often have variations in speed (a car might travel along a street at 50 km/h, slow to 0 km/h, and then reach 30 km/h).

Instantaneous speed

Speed at some instant, or assumed constant during a very short period of time, is called instantaneous speed. By looking at a speedometer, one can read the instantaneous speed of a car at any instant.[3] A car travelling at 50 km/h generally goes for less than one hour at a constant speed, but if it did go at that speed for a full hour, it would travel 50 km. If the vehicle continued at that speed for half an hour, it would cover half that distance (25 km). If it continued for only one minute, it would cover about 833 m.

In mathematical terms, the instantaneous speed v is defined as the magnitude of the instantaneous velocity {boldsymbol {v}}, that is, the derivative of the position {boldsymbol {r}} with respect to time:[2][4]

v=left|{boldsymbol  v}right|=left|{dot  {{boldsymbol  r}}}right|=left|{frac  {d{boldsymbol  r}}{dt}}right|,.

If s is the length of the path (also known as the distance) travelled until time t, the speed equals the time derivative of s:[2]

v={frac  {ds}{dt}}.

In the special case where the velocity is constant (that is, constant speed in a straight line), this can be simplified to v=s/t. The average speed over a finite time interval is the total distance travelled divided by the time duration.

Average speed

Different from instantaneous speed, average speed is defined as the total distance covered divided by the time interval. For example, if a distance of 80 kilometres is driven in 1 hour, the average speed is 80 kilometres per hour. Likewise, if 320 kilometres are travelled in 4 hours, the average speed is also 80 kilometres per hour. When a distance in kilometres (km) is divided by a time in hours (h), the result is in kilometres per hour (km/h).

Average speed does not describe the speed variations that may have taken place during shorter time intervals (as it is the entire distance covered divided by the total time of travel), and so average speed is often quite different from a value of instantaneous speed.[3] If the average speed and the time of travel are known, the distance travelled can be calculated by rearranging the definition to

d={boldsymbol  {{bar  {v}}}}t,.

Using this equation for an average speed of 80 kilometres per hour on a 4-hour trip, the distance covered is found to be 320 kilometres.

Expressed in graphical language, the slope of a tangent line at any point of a distance-time graph is the instantaneous speed at this point, while the slope of a chord line of the same graph is the average speed during the time interval covered by the chord. Average speed of an object is
Vav = s÷t

Difference between speed and velocity

Speed denotes only how fast an object is moving, whereas velocity describes both how fast and in which direction the object is moving.[5] If a car is said to travel at 60 km/h, its speed has been specified. However, if the car is said to move at 60 km/h to the north, its velocity has now been specified.

The big difference can be discerned when considering movement around a circle. When something moves in a circular path and returns to its starting point, its average velocity is zero, but its average speed is found by dividing the circumference of the circle by the time taken to move around the circle. This is because the average velocity is calculated by considering only the displacement between the starting and end points, whereas the average speed considers only the total distance travelled.

Tangential speed

Linear speed is the distance travelled per unit of time, while tangential speed (or tangential velocity) is the linear speed of something moving along a circular path.[6] A point on the outside edge of a merry-go-round or turntable travels a greater distance in one complete rotation than a point nearer the center. Travelling a greater distance in the same time means a greater speed, and so linear speed is greater on the outer edge of a rotating object than it is closer to the axis. This speed along a circular path is known as tangential speed because the direction of motion is tangent to the circumference of the circle. For circular motion, the terms linear speed and tangential speed are used interchangeably, and both use units of m/s, km/h, and others.

Rotational speed (or angular speed) involves the number of revolutions per unit of time. All parts of a rigid merry-go-round or turntable turn about the axis of rotation in the same amount of time. Thus, all parts share the same rate of rotation, or the same number of rotations or revolutions per unit of time. It is common to express rotational rates in revolutions per minute (RPM) or in terms of the number of «radians» turned in a unit of time. There are little more than 6 radians in a full rotation (2π radians exactly). When a direction is assigned to rotational speed, it is known as rotational velocity or angular velocity. Rotational velocity is a vector whose magnitude is the rotational speed.

Tangential speed and rotational speed are related: the greater the RPMs, the larger the speed in metres per second. Tangential speed is directly proportional to rotational speed at any fixed distance from the axis of rotation.[6] However, tangential speed, unlike rotational speed, depends on radial distance (the distance from the axis). For a platform rotating with a fixed rotational speed, the tangential speed in the centre is zero. Towards the edge of the platform the tangential speed increases proportional to the distance from the axis.[7] In equation form:

vpropto !,romega ,,

where v is tangential speed and ω (Greek letter omega) is rotational speed. One moves faster if the rate of rotation increases (a larger value for ω), and one also moves faster if movement farther from the axis occurs (a larger value for r). Move twice as far from the rotational axis at the centre and you move twice as fast. Move out three times as far, and you have three times as much tangential speed. In any kind of rotating system, tangential speed depends on how far you are from the axis of rotation.

When proper units are used for tangential speed v, rotational speed ω, and radial distance r, the direct proportion of v to both r and ω becomes the exact equation

v=romega ,.

Thus, tangential speed will be directly proportional to r when all parts of a system simultaneously have the same ω, as for a wheel, disk, or rigid wand.

Units

Units of speed include:

  • metres per second (symbol m s−1 or m/s), the SI derived unit;
  • kilometres per hour (symbol km/h);
  • miles per hour (symbol mi/h or mph);
  • knots (nautical miles per hour, symbol kn or kt);
  • feet per second (symbol fps or ft/s);
  • Mach number (dimensionless), speed divided by the speed of sound;
  • in natural units (dimensionless), speed divided by the speed of light in vacuum (symbol c = 299792458 m/s).
Conversions between common units of speed

m/s km/h mph knot ft/s
1 m/s = 1 3.600000 2.236936* 1.943844* 3.280840*
1 km/h = 0.277778* 1 0.621371* 0.539957* 0.911344*
1 mph = 0.44704 1.609344 1 0.868976* 1.466667*
1 knot = 0.514444* 1.852 1.150779* 1 1.687810*
1 ft/s = 0.3048 1.09728 0.681818* 0.592484* 1

(* = approximate values)

Examples of different speeds

Speed m/s ft/s km/h mph Notes
Global average sea level rise 0.00000000011 0.00000000036 0.0000000004 0.00000000025 3.5 mm/year[8]
Approximate rate of continental drift 0.0000000013 0.0000000042 0.0000000045 0.0000000028 4 cm/year. Varies depending on location.
Speed of a common snail 0.001 0.003 0.004 0.002 1 millimetre per second
A brisk walk 1.7 5.5 6.1 3.8
A typical road cyclist 4.4 14.4 16 10 Varies widely by person, terrain, bicycle, effort, weather
A fast martial arts kick 7.7 25.2 27.7 17.2 Fastest kick recorded at 130 milliseconds from floor to target at 1 meter distance. Average velocity speed across kick duration[9]
Sprint runners 12.2 40 43.92 27 Usain Bolt’s 100 metres world record.
Approximate average speed of road race cyclists 12.5 41.0 45 28 On flat terrain, will vary
Typical suburban speed limit in most of the world 13.8 45.3 50 30
Taipei 101 observatory elevator 16.7 54.8 60.6 37.6 1010 m/min
Typical rural speed limit 24.6 80.66 88.5 56
British National Speed Limit (single carriageway) 26.8 88 96.56 60
Category 1 hurricane 33 108 119 74 Minimum sustained speed over 1 minute
Average peak speed of a cheetah 33.53 110 120.7 75
Speed limit on a French autoroute 36.1 118 130 81
Highest recorded human-powered speed 37.02 121.5 133.2 82.8 Sam Whittingham in a recumbent bicycle[10]
Average speed of Human sneeze 44.44 145.82 160 99.42
Muzzle velocity of a paintball marker 90 295 320 200
Cruising speed of a Boeing 747-8 passenger jet 255 836 917 570 Mach 0.85 at 35000 ft (10668 m) altitude
Speed of a .22 caliber Long Rifle bullet 326.14 1070 1174.09 729.55
The official land speed record 341.1 1119.1 1227.98 763
The speed of sound in dry air at sea-level pressure and 20 °C 343 1125 1235 768 Mach 1 by definition. 20 °C = 293.15 kelvins.
Muzzle velocity of a 7.62×39mm cartridge 710 2330 2600 1600 The 7.62×39mm round is a rifle cartridge of Soviet origin
Official flight airspeed record for jet engined aircraft 980 3215 3530 2194 Lockheed SR-71 Blackbird
Space Shuttle on re-entry 7800 25600 28000 17,500
Escape velocity on Earth 11200 36700 40000 25000 11.2 km·s−1
Voyager 1 relative velocity to the Sun in 2013 17000 55800 61200 38000 Fastest heliocentric recession speed of any humanmade object.[11] (11 mi/s)
Average orbital speed of planet Earth around the Sun 29783 97713 107218 66623
The fastest recorded speed of the Helios probes 70,220 230,381 252,792 157,078 Recognized as the fastest speed achieved by a man-made spacecraft, achieved in solar orbit.
Orbital speed of the Sun relative to the center of the galaxy 251000 823000 904000 561000
Speed of the Galaxy relative to the CMB 550000 1800000 2000000 1240000
Speed of light in vacuum (symbol c) 299792458 983571056 1079252848 670616629 Exactly 299792458 m/s, by definition of the metre

Psychology

According to Jean Piaget, the intuition for the notion of speed in humans precedes that of duration, and is based on the notion of outdistancing.[12] Piaget studied this subject inspired by a question asked to him in 1928 by Albert Einstein: «In what order do children acquire the concepts of time and speed?»[13] Children’s early concept of speed is based on «overtaking», taking only temporal and spatial orders into consideration, specifically: «A moving object is judged to be more rapid than another when at a given moment the first object is behind and a moment or so later ahead of the other object.»[14]

See also

  • Air speed
  • Land speed
  • List of vehicle speed records
  • Typical projectile speeds
  • Speedometer
  • V speeds

References

Wikiquote has quotations related to Speed.

Wikimedia Commons has media related to Speed.

  • Richard P. Feynman, Robert B. Leighton, Matthew Sands. The Feynman Lectures on Physics, Volume I, Section 8–2. Addison-Wesley, Reading, Massachusetts (1963). ISBN 0-201-02116-1.
  1. ^ Wilson, Edwin Bidwell (1901). Vector analysis: a text-book for the use of students of mathematics and physics, founded upon the lectures of J. Willard Gibbs. Yale bicentennial publications. C. Scribner’s Sons. p. 125. hdl:2027/mdp.39015000962285. This is the likely origin of the speed/velocity terminology in vector physics.
  2. ^ a b c Elert, Glenn. «Speed & Velocity». The Physics Hypertextbook. Retrieved 8 June 2017.
  3. ^ a b c Hewitt (2006), p. 42
  4. ^ «IEC 60050 — Details for IEV number 113-01-33: «speed»«. Electropedia: The World’s Online Electrotechnical Vocabulary. Retrieved 2017-06-08.
  5. ^ Wilson, Edwin Bidwell (1901). Vector analysis: a text-book for the use of students of mathematics and physics, founded upon the lectures of J. Willard Gibbs. Yale bicentennial publications. C. Scribner’s Sons. p. 125. hdl:2027/mdp.39015000962285. This is the likely origin of the speed/velocity terminology in vector physics.
  6. ^ a b Hewitt (2006), p. 131
  7. ^ Hewitt (2006), p. 132
  8. ^ NASA’s Goddard Space Flight Center. «Satellite sea level observations». Global Climate Change. NASA. Retrieved 20 April 2022.
  9. ^ «Improve Kicking Speed for Martial Arts | Get Fast Kicks!». Archived from the original on 2013-11-11. Retrieved 2013-08-14.
  10. ^ «The Recumbent Bicycle and Human Powered Vehicle Information Center». Archived from the original on 2013-08-11. Retrieved 2013-10-12.
  11. ^ Darling, David. «Fastest Spacecraft». Retrieved August 19, 2013.
  12. ^ Jean Piaget, Psychology and Epistemology: Towards a Theory of Knowledge, The Viking Press, pp. 82–83 and pp. 110–112, 1973. SBN 670-00362-x
  13. ^ Siegler, Robert S.; Richards, D. Dean (1979). «Development of Time, Speed, and Distance Concepts» (PDF). Developmental Psychology. 15 (3): 288–298. doi:10.1037/0012-1649.15.3.288.
  14. ^ Early Years Education: Histories and Traditions, Volume 1. Taylor & Francis. 2006. p. 164. ISBN 9780415326704.

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