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English definition of “sign (sb) in”

sign (sb) in

phrasal verb with sign     /saɪn/ verb
to sign your name or the name of someone who is visiting you in a book , in order to be allowed to enter a building such as an office or hotel : New security measures require all visitors to sign in at reception and wear a visitor's badge .Signing and signatures
(Definition of sign (sb) in from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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