A ball gown is a formal and elaborate type of evening dress typically worn at formal events such as balls, proms, or formal dinners. Ball gowns are traditionally floor-length with a full skirt and are often made of luxurious fabrics like silk, satin, or taffeta. They are designed to make a statement and are often embellished with lace, embroidery, beads, or sequins.

Historically, ball gowns were associated with royalty and the upper class, and they continue to be worn at events where formal attire is required. The silhouette of a ball gown usually features a fitted bodice and a full, voluminous skirt that can be achieved through layers of petticoats or hoop skirts.

Modern interpretations of ball gowns can vary widely in style and design, ranging from classic and elegant designs to more contemporary and avant-garde creations. Designers often incorporate current fashion trends and innovative techniques into their ball gown designs while maintaining the formal and opulent essence of the garment.