check in definition, meaning - what is check in in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “check in”

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check in

phrasal verb with check uk   us   /tʃek/ verb
B1 to show your ticket at an airport so that you can be told where you will be sitting and so that your bags can be put on the aircraft: Passengers are requested to check in two hours before the flight. You can save time by checking on online.
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(Definition of check in from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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