What term refers to the actual solids or forms in a design space?

The term that refers to the actual solids or forms in a design space is "positive space." Positive space encompasses the physical objects, furniture, and architectural elements that occupy a space and define its character. When considering interior design, understanding positive space is essential for creating a cohesive and functional layout.

In contrast, negative space refers to the areas around and between the positive forms. It is just as important in design, as it helps create balance and allows the positive elements to be showcased effectively. Active space generally pertains to spaces that are functional and used frequently, whereas neutral space describes areas that are subdued and do not distract from the surrounding design elements. The focus on positive space emphasizes the tangible aspects of a room, which is crucial for effective interior design.