Meaning & use
reaction time
The interval between a stimulus occurring and a person's response to it.
See it in a sentence
Researchers measured each driver's reaction time to a sudden obstacle appearing on the road.
Years of practice had sharpened the goalkeeper's reaction time to lightning speed.
A note on using this word
Reaction time is a standard term in psychology, sports science, and driving safety studies, usually measured in milliseconds.
Words with a similar meaning
response time
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
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