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

A chemical reaction is the change that happens when two or more substances are mixed with each other.

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

Knowing your reaction time is an important part of your life and can be used to measure your alertness, quick thinking, and overall physical performance. It can be used in a variety of ways, such as in …

Usage: Reaction is used to refer both to an instant response (her reaction was one of amazement) and to a considered response in the form of a statement (the Minister gave his reaction to the court's …

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.

Your reaction to something that has happened or something that you have experienced is what you feel, say, or do because of it.

The meaning of REACT is to exert a reciprocal or counteracting force or influence —often used with on or upon. How to use react in a sentence.

During the Reaction Time Test, you'll need to click as quickly as possible when the color changes from red to green. The test measures the time between the color change and your click, providing instant …

Dec 14, 2025 · reaction (plural reactions) An action or statement in response to a stimulus or other event.