mlin

1. mill
   Nekada smo nosili pšenicu u mlin. — We used to take wheat to the mill.
   Na kraju sela je stari mlin. — There's an old mill at the edge of the village.
2. grinder
   Kupila sam novi mlin za kafu. — I bought a new coffee grinder.
   Mlin za biber je opet prazan. — The pepper grinder is empty again.

A kitchen grinder is usually called mlin za kafu / za biber, or the diminutive mlinac.