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English definition of “detention”

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detention

noun [C/U]  /dɪˈten·tʃən/ us  
the act or condition of being officially forced to stay in a place: [U] He claimed that his detention by the authorities was unlawful. Detention is also a punishment in which a student must remain in school for a short time after classes have ended for the day.
(Definition of detention from the Cambridge Academic Content Dictionary © Cambridge University Press)
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