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English definition of “therein”

therein

adverb
 
 
/ˌðeəˈrɪn/ formal
in a particular document or place: We recommend that you study the report and the proposals contained therein.In and at
therein lies sth because of the reason that has just been given: But the medicines are expensive, and therein lies the problem.Motives and reasons
(Definition of therein from the Cambridge Learners Dictionary © Cambridge University Press)
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