The Collaborative International Dictionary of English v.0.48:

Unfortunate \Un*for"tu*nate\, a.
   Not fortunate; unsuccessful; not prosperous; unlucky;
   attended with misfortune; unhappy; as, an unfortunate
   adventure; an unfortunate man; an unfortunate commander;
   unfortunate business. -- n. An unfortunate person. --Hood.
   [1913 Webster] -- Un*for"tu*nate*ly, adv. --
   Un*for"tu*nate*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unfortunate
    adj 1: not favored by fortune; marked or accompanied by or
           resulting in ill fortune; "an unfortunate turn of
           events"; "an unfortunate decision"; "unfortunate
           investments"; "an unfortunate night for all concerned"
           [ant: fortunate]
    2: not auspicious; boding ill [syn: inauspicious,
       unfortunate] [ant: auspicious]
    3: unsuitable or regrettable; "an unfortunate choice of words";
       "an unfortunate speech"
    n 1: a person who suffers misfortune [syn: unfortunate,
         unfortunate person]