Definition of Speed in English :

Define Speed in English

Speed meaning in English

Meaning of Speed in English

Pronunciation of Speed in English

Speed pronunciation in English

Pronounce Speed in English


see synonyms of speed


1. speed, velocity

distance travelled per unit time

2. fastness, speed, swiftness

a rate (usually rapid) at which something happens

Example Sentences:
'the project advanced with gratifying speed'

3. hurrying, speed, speeding

changing location rapidly

4. f number, focal ratio, speed, stop number

the ratio of the focal length to the diameter of a (camera) lens system

5. amphetamine, pep pill, speed, upper

a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression


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

move fast

Example Sentences:
'He rushed down the hall to receive his guests'
'The cars raced down the street'

7. accelerate, quicken, speed, speed up

move faster

Example Sentences:
'The car accelerated'

8. hurry, speed, travel rapidly, zip

move very fast

Example Sentences:
'The runner zipped past us at breakneck speed'

9. speed

travel at an excessive or illegal velocity

Example Sentences:
'I got a ticket for speeding'

10. accelerate, speed, speed up

cause to move faster

Example Sentences:
'He accelerated the car'

WordNet Lexical Database for English. Princeton University. 2010.


see synonyms of speed
the act or quality of acting or moving fast; rapidity
the rate at which something moves, is done, or acts
3. 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
a gear ratio in a motor vehicle, bicycle, etc
(in combination)
a three-speed gear
6. photography
a numerical expression of the sensitivity to light of a particular type of film, paper, or plate
See also ISO rating
7. photography
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.  a slang word for amphetamine
9. archaic
prosperity or success
10.  at speed
11.  up to speed
verbWord forms: speeds, speeding, sped or speeded
to move or go or cause to move or go quickly
13. (intransitive)
to drive (a motor vehicle) at a high speed, esp above legal limits
14. (transitive)
to help further the success or completion of
15. (intransitive) slang
to take or be under the influence of amphetamines
16. (intransitive)
to operate or run at a high speed
17. archaic
a. (intransitive)
to prosper or succeed
b. (transitive)
to wish success to

Collins English Dictionary. Copyright © HarperCollins Publishers


see synonyms of speed
the act or state of moving rapidly; swiftness; quick motion
the rate of movement or motion; velocity (sense 2) velocity (sense 2a)
the magnitude of a velocity (sense 2) velocity (sense 2b)
the rate or rapidity of any action
reading speed
a gear or arrangement of gears for the drive of an engine or bicycle
a truck with five forward speeds
4.  Informal
one's kind or level of taste, capability, etc.
5.  US, Slang
any of various amphetamine compounds, esp. methedrine
6.  Archaic
luck; success; prosperity
to wish someone good speed
7.  Photography
the sensitivity of film to light, expressed in various numerical scales
the widest effective aperture of a camera lens
see also f-number
the length of time the shutter is opened for an exposure
of or having to do with speed
verb intransitiveWord forms: sped or ˈspeeded, ˈspeeding
to move rapidly, esp. more rapidly than is safe or allowed by law
10.  Archaic
to get along; fare
to have fortune, good or bad
to have good fortune; prosper; succeed
verb transitive
to help (a project) to succeed; aid; promote
to wish Godspeed to
to speed the parting guest
to send, convey, or cause to move, go, etc. swiftly
to speed a letter on its way
to cause or design (a machine, etc.) to operate at a certain speed or speeds
15.  Archaic
to cause to succeed or prosper

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.


see synonyms of speed
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.
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?
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
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.
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.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.