The Collaborative International Dictionary of English v.0.48:

Voluptuous \Vo*lup"tu*ous\, a. [F. voluptueux, L. voluptuosus,
   fr. voluptas pleasure, volup agreeably, delightfully;
   probably akin to Gr. ? to hope, ? hope, and to L. velle to
   wish. See Voluntary.]
   1. Full of delight or pleasure, especially that of the
      senses; ministering to sensuous or sensual gratification;
      exciting sensual desires; luxurious; sensual.
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            Music arose with its voluptuous swell. --Byron.
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            Sink back into your voluptuous repose. --De Quincey.
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   2. Given to the enjoyments of luxury and pleasure; indulging
      to excess in sensual gratifications. "The jolly and
      voluptuous livers." --Atterbury.
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            Softened with pleasure and voluptuous life.
                                                  --Milton.
      [1913 Webster] -- Vo*lup"tu*ous*ly, adv. --
      Vo*lup"tu*ous*ness, n.
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WordNet (r) 3.0 (2006):

voluptuously
    adv 1: in a shapely and voluptuous manner; "a voluptuously
           curved woman"
    2: in an indulgently voluptuous manner; "he sniffed the perfume
       voluptuously"