vodič

1. guide; tour guide
   Naš vodič je govorio odlično engleski. — Our guide spoke excellent English.
   Na planinu smo išli sa iskusnim vodičem. — We went up the mountain with an experienced guide.
2. guidebook; guide
   Kupila sam vodič kroz Beograd. — I bought a guidebook to Belgrade.
   Na sajtu postoji vodič za nove korisnike. — The website has a guide for new users.
3. Croat. (in physics) conductor
   Bakar je dobar vodič struje. — Copper is a good conductor of electricity.

A TV host is voditelj, not vodič. For the physics sense 'conductor', in Serbia: provodnik (Bakar je dobar provodnik struje); vodič in this sense is characteristic of Croatian usage.