The Collaborative International Dictionary of English v.0.48:

Marvel \Mar"vel\, n. [OE. mervaile, F. merveille, fr. L.
   mirabilia wonderful things, pl., fr. mirabilis wonderful, fr.
   mirari to wonder or marvel at. See Admire, Smile, and cf.
   Miracle.]
   1. That which causes wonder; a prodigy; a miracle.
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            I will do marvels such as have not been done. --Ex.
                                                  xxxiv. 10.
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            Nature's sweet marvel undefiled.      --Emerson.
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   2. Wonder. [R.] "Use lessens marvel." --Sir W. Scott.
      [1913 Webster] marvel of Peru

The Collaborative International Dictionary of English v.0.48:

Marvel \Mar"vel\, v. i. [imp. & p. p. Marveledor Marvelled;
   p. pr. & vb. n. Marveling or Marvelling.] [OE. merveilen,
   OF. merveillier.]
   To be struck with surprise, astonishment, or wonder; to
   wonder.
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         Marvel not, my brethren, if the world hate you. --1
                                                  john iii. 13.
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The Collaborative International Dictionary of English v.0.48:

Marvel \Mar"vel\, v. t.
   1. To marvel at. [Obs.] --Wyclif.
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   2. To cause to marvel, or be surprised; -- used impersonally.
      [Obs.]
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            But much now me marveleth.            --Rich. the
                                                  Redeless.
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WordNet (r) 3.0 (2006):

marvel
    n 1: something that causes feelings of wonder; "the wonders of
         modern science" [syn: wonder, marvel]
    v 1: be amazed at; "We marvelled at the child's linguistic
         abilities" [syn: wonder, marvel]
    2: express astonishment or surprise about something