Source : Webster's Revised Unabridged Dictionary (1913)

Sadly \Sad"ly\, adv.
   1. Wearily; heavily; firmly. [Obs.]

            In go the spears full sadly in arest. --Chaucer.

   2. Seriously; soberly; gravely. [Obs.]

            To tell thee sadly, shepherd, without blame Or our
            neglect, we lost her as we came.      --Milton.

   3. Grievously; deeply; sorrowfully; miserably. ``He sadly
      suffers in their grief.'' --Dryden.

Source : WordNet®

sadly
     adv 1: in an unfortunate way; "sadly he died before he could see
            his grandchild" [syn: {unhappily}] [ant: {happily}]
     2: with sadness; in a sad manner; "`She died last night,' he
        said sadly"
     3: in an unfortunate or deplorable manner; "he was sadly
        neglected"; "it was woefully inadequate" [syn: {deplorably},
         {lamentably}, {woefully}]