Curtain wall may refer to:
Curtain wall (architecture), the outer skin of a modern building, often used in commercial or high-rise buildings, which may include glass, aluminum, or composite panels.
Curtain wall (construction), a system used for installing windows and exterior façades, including curtain walling stick systems and modular panel systems.
Curtain wall (fortification), the outer wall of a castle or defensive structure, typically located between two bastions.