What is the meaning of Topside?

The side or part of something that is at the top.

The surface of a ship’s hull that is above the water line.

The structure and assembly of modules above the jacket or gravity base sub structure.

The structure and assembly of modules on the deck of any floating installation.

The outer side of a round of beef.

Abovedeck, such as on the weather deck or bridge.

Abovedeck, such as on the weather deck or bridge.

Source: wiktionary.org