What term refers to something that has been built or constructed?

The term that refers to something that has been built or constructed is "structure." In the context of construction and engineering, a structure typically encompasses any physical entity that is created or assembled, including buildings, bridges, and other forms of construction. It emphasizes the physical link between various components that support loads and fulfill a specific purpose.

While other terms like "architecture," "framework," and "infrastructure" may relate to construction, they carry different meanings. "Architecture" often refers to the design, style, or concept of a building rather than the built entity itself. "Framework" suggests a skeletal structure or outline but doesn't fully capture the idea of the complete construction. "Infrastructure" generally refers to the underlying systems and services that support the economy and society, such as roads, utilities, and other essential facilities, rather than a standalone constructed entity. Thus, "structure" is the most accurate term to describe something that has been built or constructed.