A "rim" refers to the outer edge or border of an object, often circular in shape. It is commonly associated with items like wheels, where the rim holds the tire in place. Rims can also be found on various objects, such as glasses, plates, and sports equipment, serving both functional and decorative purposes. In the context of vehicles, the rim is a crucial component of the wheel, providing structural support and affecting performance. Rims come in various materials, including aluminum and steel, and can be customized for aesthetics or enhanced performance in automobiles and bicycles.