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.

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.

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).

reason is one of the 1000 most common headwords. (countable & uncountable) A reason to do something is why you do it, or the cause of something. The low price was the main reason for buying it. I asked them about the reason why we should go. The police are looking for the reason for the accident.

Plural form of reason. Third-person singular simple present indicative form of reason. Whatever their reasons, they treated us well. Prince Andrew began to explain to her the reasons for this delay. We have a lot more reasons than that, don't we? For reasons he couldn't explain, Tim's assignment irritated him. The reasons are obvious.