The Collaborative International Dictionary of English v.0.48:

Loveless \Love"less\, a.
   1. Void of love; void of tenderness or kindness. --Milton.
      Shelton.
      [1913 Webster]

   2. Not attracting love; unattractive.
      [1913 Webster]

            These are ill-favored to see to; and yet, as
            loveless as they be, they are not without some
            medicinable virtues.                  --Holland.
      [1913 Webster]

WordNet (r) 3.0 (2006):

loveless
    adj 1: without love; "a loveless marriage"
    2: receiving no love; "a loveless childhood"

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "loveless":
   desireless, forsaken, inappetent, jilted, lovelorn, nirvanic,
   passionless, rejected, spurned, unambitious, unaspiring,
   unattracted, unbeloved, uncherished, undesirous, uneager,
   unenthusiastic, unloved