Meaning : The ratio of the focal length to the diameter of a (camera) lens system.
Synonyms : f number, focal ratio, stop number
Meaning : A central nervous system stimulant that increases energy and decreases appetite. Used to treat narcolepsy and some forms of depression.
Synonyms : amphetamine, pep pill, upper
Meaning : Move hurridly.
Example :
He rushed down the hall to receive his guests.
The cars raced down the street.
Synonyms : belt along, bucket along, cannonball along, hasten, hie, hotfoot, pelt along, race, rush, rush along, step on it
Meaning : Move very fast.
Example :
The runner zipped past us at breakneck speed.
Synonyms : hurry, travel rapidly, zip
Meaning : Travel at an excessive or illegal velocity.
Example :
I got a ticket for speeding.
Speed ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Marathi. Speed ka matlab kya hota hai?