/ ˌɪnstəˈleɪʃn; NAmE / noun
1.
[ U , C ] the act of fixing equipment or furniture in position so that it can be used :
installation costs
Installation of the new system will take several days.
2.
[ C ] a piece of equipment or machinery that has been fixed in position so that it can be used :
a heating installation
3.
[ C ] a place where specialist equipment is kept and used :
a military installation
4.
[ U ] the act of placing sb in a new position of authority, often with a ceremony :
the installation of the new vice chancellor
5.
[ C ] ( art ) a piece of modern sculpture that is made using sound, light, etc. as well as objects
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WORD ORIGIN
late Middle English : from medieval Latin installatio(n-) , from the verb installare , from in- into + stallum place, stall.