The Collaborative International Dictionary of English v.0.48:

Miraculous \Mi*rac"u*lous\, a. [F. miraculeux. See Miracle.]
   [1913 Webster]
   1. Of the nature of a miracle; performed by supernatural
      power; effected by the direct agency of almighty power,
      and not by natural causes.
      [1913 Webster]

   2. Supernatural; wonderful.
      [1913 Webster]

   3. Wonder-working. "The miraculous harp." --Shak.
      [1913 Webster] -- Mi*rac"u*lous*ly, adv. --
      Mi*rac"u*lous*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

miraculously
    adv 1: in a miraculous manner; "my hand grasped the gun that
           was, miraculously, lying on the ground beside my finger
           tips"

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "miraculously":
   beguilingly, bewilderingly, enigmatically, exceptionally,
   extraordinarily, fabulously, fantastically, fascinatingly,
   incomprehensibly, inconceivably, incredibly, marvelously,
   outlandishly, phenomenally, prodigiously, puzzlingly, remarkably,
   sensationally, strangely, strikingly, stupendously, unimaginably,
   wonderfully, wondrously