English

Definition of therein adverb from the Oxford Advanced Learner's Dictionary

 

therein

 adverb
adverb
BrE BrE//ˌðeərˈɪn//
 
; NAmE NAmE//ˌðerˈɪn//
 
(law or formal)
 
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  • in the place, object, document, etc. mentioned The insurance policy covers the building and any fixtures contained therein. In court she denied any knowledge of the article and the allegations made therein.
  • Idioms used to emphasize the result or consequence of a particular situation He works extremely hard and therein lies the key to his success.
    See the Oxford Advanced American Dictionary entry: therein