definition of
installation

[1] #1 installation n. [installing, installment, instalment] the act of installing something (as equipment); "the telephone installation took only a few minutes". wn

[2] #2 installation n. [facility] a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility". wn

[3] #3 installation n. [initiation, induction] a formal entry into an organization or position or office; "his initiation into the club"; "he was ordered to report for induction into the army"; "he gave a speech as part of his installation into the hall of fame". wn