The Collaborative International Dictionary of English v.0.48:

Disobedient \Dis`o*be"di*ent\, a. [Pref. dis- + obedient. See
   Disobey, Obedient.]
   1. Neglecting or refusing to obey; omitting to do what is
      commanded, or doing what is prohibited; refractory; not
      observant of duty or rules prescribed by authority; --
      applied to persons and acts.
      [1913 Webster]

            This disobedient spirit in the colonies. --Burke.
      [1913 Webster]

            Disobedient unto the word of the Lord. --1 Kings
                                                  xiii. 26.
      [1913 Webster]

   2. Not yielding.
      [1913 Webster]

            Medicines used unnecessarily contribute to shorten
            life, by sooner rendering peculiar parts of the
            system disobedient to stimuli.        --E. Darwin.
      [1913 Webster]

WordNet (r) 3.0 (2006):

disobedient
    adj 1: not obeying or complying with commands of those in
           authority; "disobedient children" [ant: obedient]
    2: unwilling to submit to authority; "unruly teenagers" [syn:
       disobedient, unruly]

Moby Thesaurus II by Grady Ward, 1.0:

86 Moby Thesaurus words for "disobedient":
   anarchic, at odds, averse, bad, contrary, contumacious,
   cross-grained, cursory, deaf to, declinatory, defiant, delinquent,
   derelict, differing, disagreeing, disinclined, disregardful,
   forced, fractious, froward, headstrong, heady, ill-behaved,
   incompliant, indisciplined, indisposed, indocile, insubordinate,
   intractable, involuntary, irresponsible, lawless, licentious,
   mischievous, mutinous, naughty, negative, nonconforming,
   nonconsenting, obdurate, obstinate, obstreperous, opposed,
   perfunctory, perverse, pigheaded, rampant, rebellious,
   recalcitrant, recusant, refractory, reinless, rejective, remiss,
   resistant, revolting, self-willed, stubborn, sulky, sullen,
   transgressive, unaccountable, unbridled, unchecked, uncomplaisant,
   uncompliant, uncomplying, unconsenting, uncontrolled,
   uncooperative, uncurbed, undisciplined, unduteous, undutiful,
   ungovernable, ungoverned, unmanageable, unreined, unrestrained,
   unruly, unsubmissive, unwilling, violative, wayward, wildcat,
   willful