[, ]the place where you go first when you arrive at an airport, to show your ticket, etc.（机场的）登机手续办理处◆The Airline apologizes for long delays at check-ins today.航空公司为今天办理登机手续耽误了很多时间而道歉。◆the check-in counter办理登机手续台 [] the act of showing your ticket, etc. when you arrive at an airport办理登机手续◆Do you know your check-in time?你知道办理登机手续的时间吗？