The reason for something is a fact or situation which explains why it happens or what causes it to happen. Who would have a reason to want to kill her? [NOUN to-infinitive] ...the reason why Italian tomatoes have so much flavour. The only reason I went was because I was told to. My parents came to Germany for business reasons.

Explanatory reasons are explanations of why things happened. For example, the reason the patient is in pain is that her nerves are sending signals from her tissues to her brain. A reason, in many cases, is brought up by the question "why?", and answered following the word because.

The meaning of REASON is a statement offered in explanation or justification. How to use reason in a sentence. Synonym Discussion of Reason.

to think or argue in a logical manner. to form conclusions, judgments, or inferences from facts or premises. to urge reasons which should determine belief or action. Synonyms: persuade

This article lists the most common reasons why people pay too much tax. Tom's problem was that he lacked confidence; Ed failed for precisely the opposite reason.

1. To determine or conclude by logical thinking: The doctor reasoned that the patient had a virus. 2. To persuade or dissuade (someone) with reasons: "You boast ... of having reasoned him out of his absurd romance" (William Makepeace Thackeray).