something installed, as machinery or apparatus placed in position or connected for use.
the act of installing.
the fact of being installed.
Military. any more or less permanent post, camp, station, base, or the like, for the support or carrying on of military activities.

1600–10; < Medieval Latin installātiōn- (stem of installātiō). See install, -ation

preinstallation, noun
reinstallation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
installation (ˌɪnstəˈleɪʃən)
1.  the act of installing or the state of being installed
2.  a large device, system, or piece of equipment that has been installed
3.  a military establishment usually serving in a support role
4.  an art exhibit often involving video or moving parts where the relation of the parts to the whole is important to the interpretation of the piece

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
In some cases, the renewable energy installation even powers equipment needed for site cleanup.
Equipment guy came in a few minutes and started the installation.
Significant experience in large-scale sound system design, installation and
  operation preferred.
Elevator installation is a mature business, yet change is under way as office
  space and energy get pricey.
Images for installation
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