The meaning of REACTION is the act or process or an instance of reacting. How to use reaction in a sentence.

Reaction Time Test When the red box turns green, click as quickly as you can. Click anywhere to start. Statistics About the test This is a simple tool to measure your reaction time. The average (median) …

REACTION definition: 1. behaviour, a feeling or an action that is a direct result of something else: 2. someone's…. Learn more.

About Reaction Time Test A reaction time test is a way of measuring how quickly an individual can respond to a given stimulus. This type of assessment is used in a variety of settings, from sports …

A reaction is an action taken in response to something. If you're telling your parents that you want to move out, you'll see by their reaction that they're sad about it.

8 meanings: 1. a response to some foregoing action or stimulus 2. the reciprocal action of two things acting together 3..... Click for more definitions.

Have you ever wondered how quick your brain can respond to new visual information? The average human reaction time is around 250ms and the world record is 120ms. Take the test to find out your …

REACTION definition: a reverse movement or tendency; an action in a reverse direction or manner. See examples of reaction used in a sentence.

Jan 20, 2026 · reaction (plural reactions) An action or statement in response to a stimulus or other event.

Test your reaction time with our free reaction speed tester. Measure how fast you react to visual stimuli and improve your reflexes for gaming.