A barn door is a style of sliding door system that has been adapted from its agricultural origins into a popular interior design element. Characterized by its distinctive sliding mechanism, it is suspended from a mounted overhead track and moves horizontally via rollers, requiring no floor space for a swinging arc. This makes it an exceptionally space-saving solution for doorways, room dividers, or closet openings. Visually, barn doors often feature a rustic or industrial aesthetic with traditional "Z" or "X" bracing, though modern, minimalist interpretations are equally common. Its primary functions are to provide spatial separation, enhance privacy, and serve as a bold decorative focal point, adding significant character and functional flexibility to a living or commercial space.