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- Dictionaryspeed/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
- 2. each of the possible gear ratios of a bicycle or motor vehicle.
verb
- 1. move quickly: "I got into the car and home we sped" Similar Opposite
- 2. make prosperous or successful: archaic "may God speed you"
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the rate at which light or sound travels: The speed of light is 300 million metres per second. These planes travel at twice the speed of sound. [ C ] a gear :
1. a. : rate of motion: such as. (1) : velocity sense 1. (2) : the magnitude of a velocity irrespective of direction. b. : the act or state of moving swiftly : swiftness. c. : impetus. 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.
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).
Galileo defined speed as the distance covered per unit of time. In equation form, that is =, where is speed, is distance, and is time. A cyclist who covers 30 metres in a time of 2 seconds, for example, has a speed of 15 metres per second.
Speed definition: rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity. See examples of SPEED used in a sentence.
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.
how fast something moves or happens: high/ low speed. He was travelling at a speed of 90 mph. Fewer examples. We were driving at full speed. He's been working to improve his speed. There's always a trade-off between speed and quality. They rounded the corner at high speed. We work at the same speed.
Definition of speed noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Speed definition: rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity. See examples of SPEED used in a sentence.
Speed can be a noun or verb. As a noun, it's an indicator of pace, as in the speed of a car. As a noun, it's also a drug that keeps you awake, very awake. As a verb, it means to “move along quickly,” like how you speed around on your bike.
