Definition of "superhub"

Each night, in less than three hours, the superhub sorts and transfers more than a million packages between connecting flights […]

2000, Roberta S. Russell, Bernard W. Taylor, Operations management: multimedia version

The Next Generation Airport is a superhub constructed offshore on a man-made island.

2009 June 14, “Next Generation Airport”, in New York Times‎

HS2 Minister Andrew Stephenson added: "This station will not only benefit the local community by enabling the comprehensive redevelopment of the area, but will serve as a transport superhub acting as a gateway to the Midlands and the North."

2022 March 23, Stefanie Foster, “Updated designs unveiled for HS2's Euston station”, in RAIL, number 953, page 23