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English definition of “reason”

reason

verb [T]     /ˈriː.zən/
to try to understand and to make judgments based on practical facts: [+ (that)] Newton reasoned (that) there must be a force such as gravity, when an apple fell on his head. I spent hours reasoning out the solution to the puzzle.Thinking and contemplatingConcluding and deducing
(Definition of reason verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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