›[U or C]ITthe act of putting a program onto a computer: She provided me with the resources required for testing the installation of the software.Software installations will be carried out by our administrators.
›[U or C]the act of putting furniture or equipment into position: The installation of extra roof and wall-support structures takes considerable time.
›[C]a system or piece of equipment that has been put somewhere: The present installations are outdated, and will be removed.
›[C]a place with people, buildings, and equipment that has a particular, especially military or industrial, purpose: a military/industrial/commercial installation