Defiantly

from WordNet (r) 3.0 (2006)

defiantly
    adv 1: in a rebellious manner; "he rejected her words
           rebelliously" [syn: {rebelliously}, {contumaciously},
           {defiantly}]

from The Collaborative International Dictionary of English v.0.48

Defiant \De*fi"ant\, a. [Cf. F. d['e]fiant, p. pr. of d['e]fier.
   See {Defy}.]
   Full of defiance; bold; insolent; as, a defiant spirit or
   act.
   [1913 Webster]

         In attitude stern and defiant.           --Longfellow.
   -- {De*fi"ant*ly}, adv. -- {De*fi"ant*ness}, n.
   [1913 Webster]