A superstructure is an upward extension of an existing structure above a baseline, in civil and naval engineering.
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Superstructure may also refer to:
- Superstructure (condensed matter): some additional structure superimposed on a more basic structure, e.g. magnetic ordering in a crystal or helical ordering in a protein.
- A universe (mathematics) obtained from a set by taking the power set countably many times.
- A structure (mathematical logic) of which another structure is a substructure.
- A key concept in Marxist philosophy, see base and superstructure.