su ‧ per ‧ struc ‧ ture /ˈsuːpəˌstrʌktʃə $ -pərˌstrʌktʃər/ BrE AmE noun [singular, uncountable]
1 . a structure that is built on top of the main part of something such as a ship or building
2 . formal a political or social system that has developed from a simpler system:
the whole superstructure of capitalism