The Collaborative International Dictionary of English v.0.48:

Alienate \Al"ien*ate\ (-[=a]t), v. t. [imp. & p. p. Alienated;
   p. pr. & vb. n. Alienating.]
   1. To convey or transfer to another, as title, property, or
      right; to part voluntarily with ownership of.
      [1913 Webster]

   2. To withdraw, as the affections; to make indifferent of
      averse, where love or friendship before subsisted; to
      estrange; to wean; -- with from.
      [1913 Webster]

            The errors which . . . alienated a loyal gentry and
            priesthood from the House of Stuart.  --Macaulay.
      [1913 Webster]

            The recollection of his former life is a dream that
            only the more alienates him from the realities of
            the present.                          --I. Taylor.
      [1913 Webster]

WordNet (r) 3.0 (2006):

alienating
    adj 1: causing hostility or loss of friendliness; "her sudden
           alienating aloofness"