Reaction definition: A reaction is an action or feeling that is caused by another event or situation.
Definitions of Reaction
- 1noun
A reaction is an action or feeling that is caused by another event or situation.
- 2noun
In chemistry, a reaction is a process involving the rearrangement of the molecular or ionic structure of a substance, typically one involving chemical changes or the formation of new substances.
- 3noun
An adverse reaction is an undesirable effect resulting from a medical treatment or drug.
Example Sentences
“His immediate reaction was to laugh.”
“The chemical reaction produced a lot of heat.”
“She had an allergic reaction to the new medication.”
Topics & Categories
Topic & ExploreInflected Word Forms
Phrases & Idiomatic Expressions
A series of events, each caused by the previous one.
An immune response to a substance that is normally harmless.
An automatic, unthinking response.
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