ulazak

1. entry; entering
   Ulazak u zgradu je zabranjen. — Entry to the building is forbidden.
   Za ulazak u zemlju treba vam viza. — You need a visa to enter the country.
2. (into an organisation) accession; joining
   Srbija pregovara o ulasku u Evropsku uniju. — Serbia is negotiating its accession to the European Union.
3. (into a final or league) making it into; qualifying for
   Tim je izborio ulazak u finale. — The team fought its way into the final.

«Ulazak» is the act of entering; the place you enter through is «ulaz».