What is the difference between a cocktail gown and an evening gown?

There really isn't a difference between a cocktail gown and an evening gown. Both terms describe a full-length formal dress designed for evenings and special occasions. On the other hand, a cocktail dress or evening dress is a less formal garment that usually falls between just above and just below the knees and is suitable for evening wear. Explore a wide variety of cocktail dresses and evening gowns on 1stDibs.