What is a bay window defined as?

A bay window is defined as a three-sided window that extends beyond the wall, creating an alcove or a small nook on the exterior of a building. This design not only enhances the aesthetics of the structure but also allows for increased natural light and panoramic views from inside the room. The three sides of a bay window often consist of a large center pane flanked by two smaller panes, which are typically angled away from the wall. This extension can also create additional indoor space, making bay windows a popular architectural feature in residential buildings.

The unique structure of bay windows differentiates them from other types of windows. For example, a window that has two parts sliding to open would typically be classified as a sliding window, while a fixed window with movable sections relates more to windows that can open but often do not extend outward. Meanwhile, a window that is hinged on the bottom represents a type of awning window, which operates differently and is not characterized by the same extension feature as a bay window. Thus, the definition of a bay window specifically highlights its three-sided formation and protruding nature, which is crucial to understanding its architectural significance.