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English definition of “tuck sb in”

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tuck sb in

( UK also tuck sb up)
verb [T usually + adv/prep] uk phrasal verb with tuck   /tʌk/ us  
to make someone comfortable in bed, especially a child, by arranging the covers round them: Daddy, if I go to bed now will you tuck me in? The children are safely tucked up in bed.
(Definition of tuck sb in from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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