prolazak

1. passing; passage
   Prolazak kroz centar grada trajao je pola sata. — Getting through the city centre took half an hour.
   Kažnjen je zbog prolaska kroz crveno svetlo. — He was fined for running a red light.
2. (of time) passing
   S prolaskom vremena sve se zaboravlja. — With the passing of time, everything is forgotten.
3. (in sport, competitions) advancing; qualification
   Reprezentacija se bori za prolazak u polufinale. — The national team is fighting to reach the semi-final.

"Prolazak" denotes the action or process, while "prolaz" can also denote a passageway. In some expressions they overlap: prolaz/prolazak u polufinale.