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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 uncontrollably down a steep hill. Speed can be a noun or verb. As a noun, it's an indicator of pace, as in the speed of a car.
The meaning of SPEED is rate of motion. How to use speed in a sentence. Synonym Discussion of Speed.
speed noun (RATE OF MOVEMENT) Add to word list. B1 [ C or U ] how fast something moves: He was traveling at a speed of 90 mph. The car has a top speed of 155 miles per hour. You should lower / reduce your speed as you approach a junction. On a clear, straight road you can gather / pick up speed.
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).
Speed definition: rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity. See examples of SPEED used in a sentence.
SPEED definition: 1. how fast something moves or happens: 2. very fast movement: 3. to move somewhere or happen…. Learn more.
Definition of speed noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
noun. /spid/ rate of movement/action. [countable, uncountable] the rate at which someone or something moves or travels He reduced speed and turned sharp left. The train began to pick up speed (= go faster).
SPEED meaning: 1 : the rate at which someone or something moves or travels; 2 : the rate at which something happens or is done
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 where is speed, is distance, and is time.
