Definition of space shuttles:
(n) :
The reusable winged orbiter of this system.
(n) :
A space transportation system developed by NASA consisting of a reusable winged orbiter, a set of recoverable booster rockets, and a fuel tank.
(n) :
Any vehicle capable of travelling repeatedly between the Earth's surface and outer space carrying people or cargo.
(n) :
Any vehicle capable of repeatedly travelling between destinations in outer space carrying people or cargo.