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

3 days ago · As the most-watched halftime show in Super Bowl history, with over 135 million views, Bad Bunny's Super Bowl Halftime Show is bound to draw opinions. Here are a few.

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 …

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.

In human behavior, a reaction refers to a response to certain situations, events, or emotions.

Jan 20, 2026 · Noun 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 …

Reaction definition: A reverse or opposing action.

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? …