Definition of the word valance

The word "valance" originated from the French term "valence," which means the quality or power that something has to combine with another substance. The term "valence" was originally used in chemistry to describe the combining power of atoms or ions. In the late 19th century, the term "valance" was adopted by the fashion industry and applied to a decorative drapery panel that hangs from the top of a window frame down to the sill. The valance, which is often made of richly textured fabrics, adds softness and color to a window while still providing privacy and shade. Over time, the term has come to refer specifically to this type of window treatment, which has become a popular decorative accent in homes and various design styles around the world.