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.

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. Reaction to the visit is mixed. A reaction against something is a way of …

3 days ago · reaction (plural reactions) An action or statement in response to a stimulus or other event.

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 decision).

Dec 1, 2025 · Reaction rates are reported as either the average rate over a period of time or as the instantaneous rate at a single time. Reaction rates can be determined over particular time intervals …

Reaction definition: A reverse or opposing action.

2 days ago · Trump’s ‘Disgusting and Vile’ Rob Reiner Post Sparks Blowback Online: ‘This Is a Sick Man’ The president claims the beloved director and his wife were killed due to “Trump Derangement ...