Source : Webster's Revised Unabridged Dictionary (1913)

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}.]
   1. To set in a seat; to give a place to; establish (one) in a
      place.

            She installed her guest hospitably by the fireside.
                                                  --Sir W.
                                                  Scott.

   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.

            Unworthily Thou wast installed in that high degree.
                                                  --Shak.

Source : WordNet®

instal
     v 1: set up for use; "install the washer and dryer"; "We put in a
          new sink" [syn: {install}, {put in}, {set up}]
     2: place; "Her manager had set her up at the Ritz" [syn: {install},
         {set up}, {establish}]
     [also: {installing}, {installed}]