Pronunciation: (sOO'pur-hī"wā, sOO"pur-hī'wā"),[key] —n. 1. a 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. 2. any very fast route or course.