A "unibody" design refers to a construction method where the outer shell of a product, such as a smartphone or laptop, is made from a single piece of material. This approach enhances durability and reduces the number of parts needed, leading to a sleeker and more streamlined appearance. In the automotive industry, unibody construction means that the body and frame of a vehicle are integrated into one cohesive structure. This design improves safety and performance by distributing stress more evenly during impacts, making unibody vehicles generally lighter and more fuel-efficient compared to traditional body-on-frame designs.