B1
the place at an airport where you show your ticket so that you can be told where you will be sitting
Dictionary examples:
The check-in counter turned into a comedy club when the ticketing system crashed. (0.0)
I arrived at the check-in counter and realized I forgot my pants! (0.0)
At the check-in counter, I accidentally said 'I love you' instead of 'Hello'. (0.0)
I'll meet you by the check-in counter. (35.6)
A representative from the tour operator will meet you at the check-in. (41.1)