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):

unfortunately
    adv 1: by bad luck; "unfortunately it rained all day"; "alas, I
           cannot stay" [syn: unfortunately, unluckily,
           regrettably, alas] [ant: as luck would have it,
           fortuitously, fortunately, luckily]