Meaning of “sign (sb) in” in the English Dictionary

british dictionary

(Definition of “sign (sb) in” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sign sb in" in Business English

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sign sb in

phrasal verb with sign uk /saɪn/ us verb

to sign your name in order to allow someone to enter an office or other building:

Will you be there to sign me in when I arrive?

(Definition of “sign sb in” from the Cambridge Business English Dictionary © Cambridge University Press)