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

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

His art is a reaction against photographic realism. A reaction can also be an unpleasant effect on the body resulting from something eaten or taken, such as a drug. A chemical reaction is the change that …

A chemical reaction describes the way a chemical behaves when combined with another substance. The way your body responds to a medication or external influence is a physical reaction. Think of the way …

Reaction definition: A reverse or opposing action.

Dec 28, 2025 · An action or statement in response to a stimulus or other event. The announcement of the verdict brought a violent reaction. You were in the courtroom. What is your reaction? When I last …

reaction is formed within English, by derivation; probably modelled on a Latin lexical item. Etymons: re- prefix, action n.

There is a risk of adverse reaction to the medicine. The reaction of hydrogen with oxygen makes water. For every action, there is an equal and opposite reaction. They have had to fight against the forces of …

reaction meaning, definition, what is reaction: something that you feel or do because of...: Learn more.

Your reaction to something that has happened or something that you have experienced is what you feel, say, or do because of it. The initial reaction of most participants is fear. He was surprised that his …