installation

noun4

1. •
   An act of installing.

   • The installation of the new software took only a few minutes.
2. •
   Something installed, especially the whole of a system of machines, apparatus, and accessories, when set up and arranged for practical working, as in electric lighting, transmission of power, etc.
3. •
   A grouping of facilities that constitute a permanent military base.

   • A military installation was built near the border.
4. •
   A work of installation art.

   • The museum is displaying a modern art installation.