The Collaborative International Dictionary of English v.0.48:

alienated \alienated\ adj.
   1. 1 socially disoriented. we live in an age of rootless
      alienated people

   Syn: anomic, disoriented
        [WordNet 1.5]

   2. having become indifferent or hostile to one's peers or
      social group.

   Syn: estranged
        [WordNet 1.5 +PJC]

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):

alienated
    adj 1: socially disoriented; "anomic loners musing over their
           fate"; "we live in an age of rootless alienated people"
           [syn: alienated, anomic, disoriented]
    2: caused to be unloved [syn: alienated, estranged]

Moby Thesaurus II by Grady Ward, 1.0:

66 Moby Thesaurus words for "alienated":
   alone, aloof, antiestablishment, apart, at odds with,
   at variance with, breakaway, companionless, counter-culture,
   detached, differing, disaffected, disagreeing, disarticulated,
   disconnected, disengaged, disjoined, disjoint, disjointed,
   disjunct, dislocated, dispersed, dissentient, dissenting,
   dissident, disunited, divided, divorced, estranged, friendless,
   homeless, in opposition, insular, irreconcilable, isolated,
   kithless, lone, lonely, lonesome, nonconforming, opposing,
   recusant, removed, rootless, scattered, sectarian, sectary,
   segregated, separate, separated, sequestered, shut off,
   single-handed, solitary, solo, torn, unabetted, unaccompanied,
   unaided, unassisted, unattended, underground, unescorted,
   unseconded, unsupported, withdrawn