klasik

1. classic author; classic
   Andrić je klasik srpske književnosti. — Andrić is one of the classic authors of Serbian literature.
   U školi čitamo mnogo klasika. — At school we read a lot of the classic authors.
2. (of a film, book, song) classic
   Ovaj film je pravi klasik. — This film is a real classic.
   Ta pesma je klasik osamdesetih. — That song is a classic of the eighties.

For classics as a genre or style, Serbian usually says "klasika".