zastor

1. curtain; blind
   Navukla je zastor da sunce ne ulazi. — She drew the curtain to keep the sun out.
   Na kraju predstave zastor se spustio. — At the end of the play the curtain came down.
2. formal (figurative) veil; screen
   Grad je nestao iza zastora magle. — The city vanished behind a veil of fog.

In everyday speech zavesa is more usual for a curtain, and roletna for a blind.