check-in (counter) · noun C /ˈtʃek.ɪnˌkaʊn.tər/
check-in (counter)
B1 the place at an airport where you show your ticket so that you can be told where you will be sitting
Dictionary examples:
A representative from the tour operator will meet you at the check-in.
I'll meet you by the check-in counter.
Learner example:
After we had finished [having coffee], we went to the check-in. (Preliminary English Test; B1; German)