okno

1. (of a window) pane; windowpane
   Lopta je razbila prozorsko okno. — The ball broke the windowpane.
   Kiša je udarala o okna celu noć. — The rain beat against the panes all night.
2. (in mining) shaft; pit
   Rudari su se spustili u okno. — The miners went down the shaft.

For "window" Serbian uses prozor; okno usually means a pane or a mine shaft.