The Collaborative International Dictionary of English v.0.48:

Install \In*stall"\, v. t. [imp. & p. p. Installed; p. pr. &
   vb. n. Installing.] [F. installer, LL. installare, fr.
   pref. in- in + OHG. stal a place, stall, G. stall, akin to E.
   stall: cf. It. installare. See Stall.] [Written also
   instal.]
   [1913 Webster]
   1. To set in a seat; to give a place to; establish (one) in a
      place.
      [1913 Webster]

            She installed her guest hospitably by the fireside.
                                                  --Sir W.
                                                  Scott.
      [1913 Webster]

   2. To place in an office, rank, or order; to invest with any
      charge by the usual ceremonies; to instate; to induct; as,
      to install an ordained minister as pastor of a church; to
      install a college president.
      [1913 Webster]

            Unworthily
            Thou wast installed in that high degree. --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

installing \installing\ n.
   1. the act of installing something (as equipment).

   Syn: installation, setting up.
        [WordNet 1.5] installment

WordNet (r) 3.0 (2006):

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