Source : Webster's Revised Unabridged Dictionary (1913)

Rebellious \Re*bel"lious\, a.
   Engaged in rebellion; disposed to rebel; of the nature of
   rebels or of rebellion; resisting government or lawful
   authority by force. ``Thy rebellious crew.'' ``Proud
   rebellious arms.'' --Milton. -- {Re*bel"lious*ly}, adv. --
   {Re*bel"lious*ness}, n.

Source : WordNet®

rebellious
     adj 1: resisting control or authority; "temperamentally
            rebellious"; "a rebellious crew"
     2: discontented as toward authority [syn: {disaffected}, {ill-affected},
         {malcontent}]
     3: participating in organized resistance to a constituted
        government; "the rebelling confederacy" [syn: {rebel(a)},
        {rebelling(a)}]