What is the term used to describe the level of the dirt adjacent to a foundation wall?

The term that describes the level of the dirt adjacent to a foundation wall is "grade." Grade refers to the slope or elevation of the ground surrounding a structure, and it plays a crucial role in ensuring proper drainage away from the foundation. Proper grading is essential to prevent water accumulation around the foundation, which can lead to structural issues and water damage.

Elevation, while it indicates height relative to a reference point, is more general and does not specifically refer to the dirt level adjacent to a foundation. The term "base" in construction often refers to the lowest part of a structure or element, but it doesn't specifically describe the surrounding dirt level. Lastly, "foundation" refers to the underlying structure that supports a building but does not denote the soil or dirt adjacent to it. Thus, grade is the most appropriate term in this context.