"superhighway" in the noun sense
1. expressway, freeway, motorway, pike, state highway, superhighway, throughway, thruway
a broad highway designed for high-speed traffic
2. superhighway, information superhighway
an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form
Source: WordNet® (An amazing lexical database of English)
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