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English definition of “sign (sb) out”

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sign (sb) out

verb uk phrasal verb with sign   /saɪn/ us  
to sign your name in a book when you leave a building such as an office or factory, or to write someone else's name in a book when they leave after visiting it: Don't forget to sign out before you leave.
(Definition of sign (sb) out from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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