superelevation Syllabification: (su·per·el·e·va·tion)Pronunciation: /ˌso͞opərˌeləˈvāSHən/Definition of superelevation noun the amount by which the outer edge of a curve on a road or railroad is banked above the inner edge. superelevation in other Oxford dictionaries Definition of superelevation in the British & World English dictionary