superhighway in WordNet English dictionary

1. a broad highway designed for high-speed traffic
   expressway  freeway  motorway  pike  state highway  superhighway  throughway  thruway 
   
2. an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form
   superhighway  information superhighway 
   

superhighway in English Wiktionary