superhighway n. + Add to list US //ˌsupɝˈhaɪˌweɪ// UK //sˈuːpəhˌaɪweɪ// su·per·high·way SynonymsEtymology Synonyms expresswayfreewaymotorwaypikethroughwaythruwayOrigin From super- + highway. Idioms1 entry01electronic superhighwaythe internet