A "rack" is a structure used for storing or displaying items. It can come in various forms, such as shelves, stands, or frames, and is commonly made from materials like wood, metal, or plastic. Racks are often used in homes, offices, and warehouses to organize products, tools, or equipment efficiently. In the context of fitness, a "rack" may refer to a weight rack, which holds weights and barbells for strength training. This type of rack helps keep gym equipment organized and accessible, promoting safety and convenience during workouts. Racks can also be found in kitchens for holding pots and pans or in libraries for displaying books.