WordReference Random House Learner's Dictionary of American English © 2026
su•per•high•way /ˈsupɚˌhaɪweɪ, ˌsupɚˈhaɪˌweɪ/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Transporta multilane highway designed for travel at high speeds;
expressway.
su•per•high•way
(so̅o̅′pər hī′wā, so̅o̅′pər hī′wā′),USA pronunciation n.
superhighway, +n.
- Transporta highway designed for travel at high speeds, having more than one lane for each direction of traffic, a safety strip dividing the two directions, and cloverleaves to route the traffic on and off the highway. Cf. expressway.
- any very fast route or course.
- super- + highway 1925–30
superhighway, +n.
- any very fast route or course.
'superhighway' also found in these entries (note: many are not synonyms or translations):