In hair design, what does "volume" refer to?

Volume in hair design specifically refers to the fullness of the hairstyle. It describes how much lift and body the hair has, contributing to the overall appearance and silhouette of the hairstyle. Techniques to enhance volume often include the use of products, styling tools like round brushes or blow dryers, and various cutting methods that create movement and dimension.

While length, thickness, and texture are important elements of hair, they do not capture the essence of "volume." Length pertains to how long the hair is, thickness (often referred to as density) relates to how many strands of hair are present per unit area, and texture addresses the surface quality (whether the hair is straight, wavy, or curly). Therefore, the definition of volume is distinct and focused solely on the fullness and lift of the hair, making it the correct answer in this context.