The Collaborative International Dictionary of English v.0.48:

Outrageous \Out*ra"geous\ (out*r[=a]"j[u^]s), a. [OF. outrageus,
   F. outrageux. See Outrage, n.]
   Of the nature of an outrage; exceeding the limits of right,
   reason, or decency; such as to cause outrage; involving or
   doing an outrage; furious; violent; atrocious. "Outrageous
   weeping." --Chaucer. "The most outrageous villainies." --Sir
   P. Sidney. "The vile, outrageous crimes." --Shak. "Outrageous
   panegyric." --Dryden.
   [1913 Webster]

   Syn: Violent; furious; exorbitant; excessive; atrocious;
        monstrous; wanton; nefarious; heinous.
        [1913 Webster] -- Out*ra"geous*ly
        (out*r[=a]"j[u^]s*l[y^]), adv. -- Out*ra"geous*ness,
        n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

outrageousness
    n 1: excessive excess [syn: exorbitance, outrageousness]
    2: the quality of being outrageous [syn: outrageousness,
       enormity]