The Collaborative International Dictionary of English v.0.48:

Lonesome \Lone"some\, a. [Compar. Lonesomer; superl.
   Lonesomest.]
   1. Secluded from society; not frequented by human beings;
      solitary.
      [1913 Webster]

            Like one that on a lonesome road
            Doth walk in fear and dread.          --Coleridge.
      [1913 Webster]

   2. Conscious of, and somewhat depressed by, solitude; as, to
      feel lonesome.
      [1913 Webster] -- Lone"some*ly, adv. --
      Lone"some*ness, n.
      [1913 Webster]