Noun superhighway has 2 senses
  1. expressway, freeway, motorway, pike, state highway, superhighway, throughway, thruway - a broad highway designed for high-speed traffic
    --1 is a kind of highway, main road
    --1 has parts: carriageway
    --1 has particulars: autobahn; autostrada; turnpike
  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
    --2 is a kind of network, electronic network
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