speed

1 of 2

noun

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
c
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
: 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
a ten-speed bicycle
5
: someone or something that appeals to one's taste
just my speed
6
: methamphetamine
also : a related stimulant drug and especially an amphetamine
7
archaic : prosperity in an undertaking : success
speedster noun

speed

2 of 2

verb

sped ˈsped How to pronounce speed (audio) or speeded; speeding

intransitive verb

1
a
: to make haste
sped to her bedside
b
: to go or drive at excessive or illegal speed
2
: to move, work, or take place faster : accelerate
the heart speeds up
3
a
archaic : to prosper in an undertaking
b
archaic : get along, fare

transitive verb

1
a
: to cause to move quickly : hasten
b
: to increase the speed of : accelerate
c
: to wish Godspeed to
2
a
: to further the success of
b
archaic : to cause or help to prosper : aid
3
: to send out
speed an arrow
speeder noun
Phrases
at speed
chiefly British
up to speed
: operating at full effectiveness or potential
Choose the Right Synonym for 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

Examples of speed in a Sentence

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.
Recent Examples on the Web
Noun
There are six categories to classify the rotational speed of tornadoes (EF0-EF5) but just two levels to warn of tornado activity. Chad Murphy, The Enquirer, 2 Apr. 2024 Vehicle speed — When a vehicle’s speed increases, the tire-traction grip and ability to control the vehicle decreases. Star-Telegram Bot, Fort Worth Star-Telegram, 1 Apr. 2024 Burns is gigantic, a refrigerator with limbs, but with unexpected speed, deft moves and, best of all perhaps, an engaging, palpable joy on the court on that is as big as his frame. Greg Cote, Miami Herald, 1 Apr. 2024 That’s why, every day, Betts is on the field early, taking full-intensity grounders off a fungo training bat while a large clock times his ability to turn plays at game speed — 4.3 seconds is the standard time to beat. Jack Harris, Los Angeles Times, 31 Mar. 2024 The mean tidal current speed is 1.94 feet per second averaged across the whole tide cycle but would be faster at some times of the month than others and generally would be faster in mid-channel than along banks. Edward Lotterman, Twin Cities, 31 Mar. 2024 The ship is underway with a heading of approximately 1-4-1 (south-east) and an approximate speed of 8 knots (9.2 mph) in the Fort McHenry channel, according to the NTSB. Ramon Padilla, USA TODAY, 30 Mar. 2024 High speed rail in California Biden touts high-speed rail between Southern California and Las Vegas. Anthony De Leon, Los Angeles Times, 21 Mar. 2024 Talk about speed: Our scientists are already decreasing plant breeding cycles from five years down to merely four months with precision breeding. Bill Anderson, Fortune, 21 Mar. 2024
Verb
When the environment is harsh and unpredictable, threatening survival, the timing of development tends to speed up, leading to individuals who mature quickly—recognizing and responding appropriately to danger as youngsters. Marc D. Hauser, TIME, 3 Apr. 2024 An exemption would have helped speed the Max 7′s certification. Lori Aratani, Washington Post, 2 Apr. 2024 This dual-band Wi-Fi 6 router supports 2.4GHz and 5GHz frequency bands and speeds up to 1.8Gbps. PCMAG, 1 Apr. 2024 In a statement to PEOPLE, a Dallas Police Department spokesperson said the Corvette and a Lamborghini were speeding in the far-left lane of the 6600 block of northbound North Central Expressway shortly before 6:25 p.m. local time. Brian Anthony Hernandez, Peoplemag, 31 Mar. 2024 Other chains plan to speed up their use of automation, including kiosks and robots. Alina Selyukh, NPR, 30 Mar. 2024 And research backs this up: Post-meal activity has been shown to speed stomach emptying and colon transit, and according to a separate study in the American Journal of Gastroenterology, even mild activity after a meal was enough to significantly reduce bloating. Lizzy Briskin, SELF, 29 Mar. 2024 Maye fires a rocket to former XFL wideout Sam Mobley and the ball speeds past his hands. Mike Kaye, Charlotte Observer, 29 Mar. 2024 Repetitive Tasks Automation is speeding up factories! Expert Panel®, Forbes, 28 Mar. 2024

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 VII 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 16 Apr. 2024.

Kids Definition

speed

1 of 2 noun
1
a
: the act or state of moving swiftly : swiftness
b
: rate of motion : velocity
2
: quickness in movement or action
3
: a transmission gear in motor vehicles or bicycles
a 10-speed bicycle
4
: methamphetamine
also : a related drug

speed

2 of 2 verb
sped ˈsped How to pronounce speed (audio) or speeded; speeding
1
a
: to move or cause to move fast
b
: to go or drive at too high a speed
2
: to increase the speed of : accelerate
often used with up

Medical Definition

speed

noun
: methamphetamine
also : a related stimulant drug and especially an amphetamine

More from Merriam-Webster on speed

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