Source : Webster's Revised Unabridged Dictionary (1913)

Insubordination \In`sub*or`di*na"tion\, n. [Cf. F.
   insubordination.]
   The quality of being insubordinate; disobedience to lawful
   authority.

Source : WordNet®

insubordination
     n 1: defiance of authority [ant: {subordination}]
     2: an insubordinate act [syn: {rebelliousness}]