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English definition of “therein”

therein

adverb uk   /ˌðeəˈrɪn/ us    /ˌðerˈɪn/ old-fashioned formal
in or into a particular place, thing, etc.: It is a thrilling tale of a haunted house and the ghosts therein.In and at
(Definition of therein from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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