Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “speed”

See all translations

speed

noun [C/U]  /spid/ us  
(a) rate at which something moves or happens: [C] a speed of 25 miles per hour [U] Both cars were traveling at high speed. [U] They came racing down the hill at top speed (= as fast as they could go). [U] The processing speed of my new computer is much faster. [C] This electric drill has two speeds (= rates at which it turns). physics Speed is also the rate at which something travels, expressed as the number of meters in a second. A speed is also a gear (= part that controls the rate at which a vehicle moves): [C] I have a ten-speed bicycle.
speedily
adverb  /ˈspi·dəl·i/ us  
The error can be speedily corrected.

speed

verb [I/T]  /spid/ ( past tense and past participle sped  /sped/ or speeded) us  
to move, go, or happen fast, or to cause something to happen fast: [I] The train sped along at over 120 miles per hour. [I] This year seems to be speeding by/past. [T] Ambulances sped the injured people (= moved them quickly) away from the scene.
Phrasal verbs
Translations of “speed”
in Korean 속도…
in Arabic سُرْعة…
in French vitesse…
in Turkish hız, sürat…
in Italian velocità…
in Chinese (Traditional) 運動速度, 速度,速率, 飛速,快速…
in Russian скорость…
in Polish szybkość, prędkość, pęd…
in Spanish velocidad, rapidez…
in Portuguese velocidade…
in German die Geschwindigkeit, die Schnelligkeit…
in Catalan velocitat…
in Japanese 速度, スピード…
in Chinese (Simplified) 运动速度, 速度,速率, 飞速,快速…
(Definition of speed from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of speed?
Add Cambridge dictionaries to your browser to your website

Definitions of “speed” in other dictionaries

Word of the Day

derivative

If something is derivative, it is not the result of new ideas, but has been developed from or copies something else.

Word of the Day

Euphemisms (Words used to Avoid Offending People)

by Kate Woodford,
March 04, 2015
​​​ We recently looked at the language that we use to describe lies and lying. One area of lying that we considered was ‘being slightly dishonest, or not speaking the complete truth’. One reason for not speaking the complete truth is to avoid saying something that might upset or offend people. Words and

Read More 

snapchat verb

March 02, 2015
to send someone a message using the photomessaging application Snapchat We used to have a thing until he got a girlfriend. now

Read More