Meaning of “tuck sb in” in the English Dictionary

british dictionary

"tuck sb in" in British English

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tuck sb in

UK also tuck sb up
phrasal verb with tuck uk /tʌk/ us /tʌk/ verb [ T usually + adv/prep ]

to make someone comfortable in bed, especially a child, by arranging the covers around 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 Learner’s Dictionary & Thesaurus © Cambridge University Press)