speed

noun
/spiːd/

The state of moving quickly or the capacity for rapid motion.

Example

“How does Usain Bolt run at that speed?”

Other meanings

The rate of motion or action, specifically the magnitude of the velocity; the rate distance is traversed in a given time.
“Speed limits provide information to the drivers about the safe speed to travel in average conditions.”
The sensitivity to light of film, plates or sensor.

Synonyms

velocity

Example sentences

“I feel the need, the need for speed!”
Tatoeba · Igider · CC0
“Time seems to speed up as you get older.”
Tatoeba · shekitten · CC0

Word history

From Old English "spēd" (success).

Where this comes from

This definition is adapted from “speed” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above; related-word lists use Open English WordNet (CC BY 4.0, based on Princeton WordNet), published under CC BY-SA 4.0. This page is published under the same licence.