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.
Researchers found no significant differences between the groups on tests of reaction time or multitasking.
From Science Daily ● Jul. 27, 2026
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
While Singapore-based Sharpa already offers a convincing humanoid table tennis robot with a reaction time of just two hundredths of a second, there is no equivalent on the market for tennis.
From Barron's ● Jan. 9, 2026
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
The relatively slow reaction time of humans “wasn’t clear until the pressure on people started to rise.”
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
