(noun, verb)


1. distance travelled per unit time

Similar word(s): velocity

Definition categories: time, rate

2. a rate (usually rapid) at which something happens

- the project advanced with gratifying speed

Similar word(s): fastness, swiftness

Definition categories: attribute, pace, rate

3. changing location rapidly

Similar word(s): hurrying, speeding

Definition categories: act, motion, move, movement

4. the ratio of the focal length to the diameter of a (camera) lens system

Definition categories: link, ratio

5. a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

Similar word(s): amphetamine, upper

Definition categories: man–made, excitant, stimulant

Sentences with speed as a noun:

- How does Usain Bolt run at that speed?


1. move hurridly

Similar word(s): hasten, hie, hotfoot, race, rush

Definition categories: motion, go, locomote, move, travel

2. move faster

Similar word(s): accelerate, quicken

Definition categories: change, deepen, intensify

3. move very fast

- The runner zipped past us at breakneck speed

Similar word(s): hurry, zip

Definition categories: motion, go, locomote, move, travel

4. travel at an excessive or illegal velocity

- I got a ticket for speeding

Definition categories: motion, go, locomote, move, travel

5. cause to move faster

Similar word(s): accelerate

Definition categories: change, alter, modify

Sentences with speed as a verb:

- God speed, until we meet again.

- The Ferrari was speeding along the road.

- Why do you speed when the road is so icy?