A "shuttle" is a vehicle or device designed to travel back and forth between two points. In space exploration, a space shuttle, like the NASA Space Shuttle, was used to transport astronauts and cargo to and from orbit. These shuttles were equipped with wings and engines, allowing them to launch into space and return safely to Earth. In everyday use, a shuttle can refer to a bus or train service that regularly moves passengers between locations, such as an airport shuttle. These services are convenient for travelers, providing easy access to and from major transport hubs and reducing the need for personal vehicles.