reason noun - definition in the Learner's Dictionary - Cambridge Dictionaries Online

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English definition of “reason”

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reason

noun
 
 
/ˈriːzən/
WHY [C] A2 the facts about why something happens or why someone does something: I knew Sam was going - that was the reason I went there. Is there any particular reason why he doesn't want to come? He left without giving a reason. That was the reason for telling her.Motives and reasonsReasons and explanations
RIGHT [C, U] B2 something that makes it right for you to do something: [+ to do sth] There is every reason to believe the project will be finished on time. I think we have reason to be concerned.Motives and reasons
ABILITY [U] the ability to think and make good decisions: By this time he'd lost his powers of reason.Mind and personalityScience of psychology and psychoanalysisLogic and reason
within reason If something is within reason, it is acceptable and possible: You can have as much as you like, within reason.Possible and probable
(Definition of reason noun from the Cambridge Learners Dictionary © Cambridge University Press)
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