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English definition of “pen sb in/up”

pen sb in/up

phrasal verb with pen     /pen/ verb [T] (-nn-) formal
to keep people or animals in a small area : The sheep were penned in behind the barn . The soldiers were penned up in their barracks .Putting people in prisonAnimal farming - general words
(Definition of pen sb in/up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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