reaction time
Americannoun
noun
Etymology
Origin of reaction time
First recorded in 1875–80
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The condition could explain why Isak’s knee collapsed, his inability to correct his posture and reduced his reaction time during a fall, Jonathan’s lawyers said.
From The Wall Street Journal ● May 28, 2026
A "simplification" of rear light systems to allow "clearer and more consistent visual cues to improve visibility and reaction time for following drivers in poor conditions".
From BBC ● Apr. 20, 2026
But if the exchanges are open when news arrives, reaction time may become more important.
From Barron's ● Oct. 23, 2025
It not only got him out of his prime hitting position, but also gave him a fraction-of-a-second less reaction time to read each pitch and make the right swing decision.
From Los Angeles Times ● May 1, 2025
Hermann von Helmholtz used one to measure the reaction time of a frog.
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
