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check in

phrasal verb with check
 
 
/tʃek/ verb

Definition

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.Arrivals and departures
(Definition of check in from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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