What characteristic defines casement windows?

Casement windows are specifically designed to swing outward or inward from their hinges and are typically operated by a crank mechanism. This design allows for better airflow when the window is open, as it can catch breezes effectively. The ability to open fully to one side means that they provide excellent ventilation and can be easily cleaned from the inside of the home.

Other window styles, such as sliding windows, operate differently by moving horizontally along a track and are not associated with the distinctive swinging operation of casement windows. Fixed windows, on the other hand, do not open at all, which is contrary to the functionality of casement windows. Lastly, while there are unique window shapes, casement windows are not defined by uncommon forms like triangles; rather, they typically feature a rectangular design that is hinged along one side.