čekanje

1. waiting; wait
   Čekanje u redu trajalo je skoro sat vremena. — The wait in line lasted almost an hour.
   Izvinite na čekanju, sad sam slobodan. — Sorry for the wait, I'm free now.
2. (na čekanju) on hold; pending
   Vaš poziv je na čekanju, molimo sačekajte. — Your call is on hold, please wait.
   Projekat je trenutno na čekanju. — The project is currently on hold.

Common set phrase: lista čekanja 'waiting list'. A 'waiting room' is a separate word, čekaonica.