noun
distance travelled per unit time
Synonyms
noun
a rate (usually rapid) at which something happens
Synonyms
Examples
- the project advanced with gratifying speed
noun
changing location rapidly
Synonyms
noun
the ratio of the focal length to the diameter of a (camera) lens system
Synonyms
focal ratio
f number
stop number
noun
a central nervous system stimulant that increases energy and decreases appetite
Synonyms
Examples
- used to treat narcolepsy and some forms of depression
verb
move hurridly
Synonyms
Examples
- He rushed down the hall to receive his guests
- The cars raced down the street
verb
move faster
Synonyms
Examples
- The car accelerated
verb
move very fast
Synonyms
Examples
- The runner zipped past us at breakneck speed
verb
travel at an excessive or illegal velocity
Examples
- I got a ticket for speeding
verb
cause to move faster
Synonyms
Examples
- He accelerated the car