installation

1. An act of installing. (countable, uncountable) · 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. (countable, uncountable)
3. A work of installation art. (countable, uncountable) · The museum is displaying a modern art installation.
4. A grouping of facilities that constitute a permanent military base. (countable, uncountable) · A military installation was built near the border.

الجمع installations