The Collaborative International Dictionary of English v.0.48:

Amaze \A*maze"\, v. t. [imp. & p. p. Amazed; p. pr. & vb. n.
   Amazing.] [Pref. a- + maze.]
   1. To bewilder; to stupefy; to bring into a maze. [Obs.]
      [1913 Webster]

            A labyrinth to amaze his foes.        --Shak.
      [1913 Webster]

   2. To confound, as by fear, wonder, extreme surprise; to
      overwhelm with wonder; to astound; to astonish greatly.
      "Amazing Europe with her wit." --Goldsmith.
      [1913 Webster]

            And all the people were amazed, and said, Is not
            this the son of David?                --Matt. xii.
                                                  23.
      [1913 Webster]

   Syn: To astonish; astound; confound; bewilder; perplex;
        surprise.

   Usage: Amaze, Astonish. Amazement includes the notion of
          bewilderment of difficulty accompanied by surprise. It
          expresses a state in which one does not know what to
          do, or to say, or to think. Hence we are amazed at
          what we can not in the least account for. Astonishment
          also implies surprise. It expresses a state in which
          one is stunned by the vastness or greatness of
          something, or struck with some degree of horror, as
          when one is overpowered by the ?normity of an act,
          etc.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Amazing \A*maz"ing\, a.
   Causing amazement; very wonderful; as, amazing grace. --
   A*maz"ing*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

amazing
    adj 1: surprising greatly; "she does an amazing amount of work";
           "the dog was capable of astonishing tricks" [syn:
           amazing, astonishing]
    2: inspiring awe or admiration or wonder; "New York is an
       amazing city"; "the Grand Canyon is an awe-inspiring sight";
       "the awesome complexity of the universe"; "this sea, whose
       gently awful stirrings seem to speak of some hidden soul
       beneath"- Melville; "Westminster Hall's awing majesty, so
       vast, so high, so silent" [syn: amazing, awe-inspiring,
       awesome, awful, awing]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "amazing":
   astonishing, astounding, awesome, breathtaking, confounding,
   dazzling, extraordinary, eye-opening, fabulous, mind-boggling,
   miraculous, overwhelming, prodigious, remarkable, spectacular,
   staggering, startling, strange, stunning, stupendous, surprising,
   wonderful, wondrous