The Collaborative International Dictionary of English v.0.48:

Forlorn \For*lorn"\, a. [OE., p. p. of forlesen to lose utterly,
   AS. forle['o]san (p. p. forloren); pref. for- + le['o]san (in
   comp.) to lose; cf. D. verliezen to lose, G. verlieren, Sw.
   f["o]rlora, Dan. forloren, Goth. fraliusan to lose. See
   For-, and Lorn, a., Lose, v. t.]
   1. Deserted; abandoned; lost.
      [1913 Webster]

            Of fortune and of hope at once forlorn. --Spenser.
      [1913 Webster]

            Some say that ravens foster forlorn children.
                                                  --Shak.
      [1913 Webster]

   2. Destitute; helpless; in pitiful plight; wretched;
      miserable; almost hopeless; desperate.
      [1913 Webster]

            For here forlorn and lost I tread.    --Goldsmith.
      [1913 Webster]

            The condition of the besieged in the mean time was
            forlorn in the extreme.               --Prescott.
      [1913 Webster]

            She cherished the forlorn hope that he was still
            living.                               --Thomson.
      [1913 Webster]

   A forlorn hope [D. verloren hoop, prop., a lost band or
      troop; verloren, p. p. of verliezen to lose + hoop band;
      akin to E. heap. See For-, and Heap.] (Mil.), a body
      of men (called in F. enfants perdus, in G. verlornen
      posten) selected, usually from volunteers, to attempt a
      breach, scale the wall of a fortress, or perform other
      extraordinarily perilous service; also, a desperate case
      or enterprise.

   Syn: Destitute, lost; abandoned; forsaken; solitary;
        helpless; friendless; hopeless; abject; wretched;
        miserable; pitiable.
        [1913 Webster]