Meaning & use
acceleration
The rate at which the speed or velocity of something increases over time.
See it in a sentence
The sports car's rapid acceleration pushed passengers back into their seats.
Scientists measured the acceleration of the falling ball using a high-speed camera.
A note on using this word
In physics, acceleration is a precise term for change in velocity per unit of time, not simply high speed.
Words with a similar meaning
speeding up
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
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