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In everyday use and in kinematics, the speed of an object is the magnitude of its velocity it is thus a scalar quantity. The average speed ...

Speed | Define Speed at Dictionary.com


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

Speed | Definition of Speed by Merriam-Webster


the rate at which someone or something moves or travels. : the rate at which something happens or is done. : the quality of being quick. Source: ...

Speed - definition of speed by The Free Dictionary


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 ...

Speed dictionary definition | speed defined - YourDictionary


A sign shows this cars speed. Licensed from iStockPhoto. noun. Speed is a way of measuring how quickly something is moving or being done, or something ...

speed - Dictionary Definition : Vocabulary.com


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 ...

speed Definition in the Cambridge English Dictionary


speed definition, meaning, what is speed: how fast something moves: . Learn more.

Speed Definition - Glossary of Physics Terms - About.com


Definition: Distance travelled per unit time. Speed is the scalar quantity that is the magnitude of the velocity vector. The most common way to calculate the ...

speed - definition of speed in English from the Oxford dictionary


1.2The rate at which something happens or is done: they were bemused by the speed of events the course is delivered on CDROM so students can progress at ...

Definition of Speed - Math is Fun


How fast something is moving. Measured as distance traveled per unit of time. Example: The speed of these cars is over 150 kilometers per hour (150 km/h).

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.
Automotive. a transmission gear ratio.
Slang. a stimulating drug, as caffeine, ephedrine, or especially methamphetamine or amphetamine.
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speed | Define speed at Dictionary.com
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