What term refers to a small recessed space in a room or wall?

The term that refers to a small recessed space in a room or wall is "alcove." An alcove is typically a partially enclosed area that can serve various purposes, such as a cozy reading nook, a place for decorative items, or simply an architectural feature that adds dimension to a room. It is characterized by its distinct indentation into the surrounding structure, which distinguishes it from other similar spaces.

Understanding the definition of "alcove" is important in architectural design and interior design, as it can significantly affect the aesthetics and functionality of a space. It allows for creative uses of space that may not be utilized with standard wall designs.

The other options—corner, niche, and bay—serve different functions or have different definitions. A corner generally refers to the point where two walls meet, while a niche is often a shallow recess designed to hold a statue or a decorative object. A bay usually describes a projection from the main structure of a building, often featuring windows or additional space that creates a feeling of openness. Each of these terms has its unique characteristics and applications in design, but "alcove" is specifically known for being a recessed area within a room or wall.