A monocoque is a structural design technique where the outer shell of an object provides the primary support and strength, rather than relying on an internal framework. This approach is commonly used in the construction of vehicles, such as cars and aircraft, allowing for lighter and more aerodynamic designs. The term comes from the French word meaning "single shell." In a monocoque structure, the materials are often engineered to distribute stress evenly across the surface, enhancing durability and performance. This design is prevalent in modern racing cars and commercial airplanes, where weight reduction is crucial for speed and fuel efficiency. Examples include the Boeing 787 and Formula 1 cars.