What is the term that refers to a physical feature defining land boundaries?

The term "bound" specifically refers to the physical features that define the boundaries of a land parcel. In the context of land measurement and surveying, bounds can include natural landmarks, such as rivers, trees, or hills, as well as man-made markers, like walls or fences. These features help demarcate the extent of ownership in real estate, making "bound" the most precise term for features that physically delineate land boundaries.

Other terms like "property line" and "boundary line" are commonly used to describe the edge of a property but do not specifically indicate the physical features that mark those lines. An "easement," on the other hand, refers to a legal right to use a portion of someone else's property for a specific purpose, rather than a feature defining property boundaries.