What is the meaning of Superstructure?

Any structure built above the top full deck (FM 55-501).

Any material structure or edifice built on something else; that which is raised on a foundation or basis.

All that part of a building above the basement.

The sleepers and fastenings, in distinction from the roadbed.

The social sphere of ideology which includes religion, art, politics, law and all traditional values.

superstructure

vocative masculine singular of superstrūctūrus

Source: wiktionary.org