The Collaborative International Dictionary of English v.0.48:

Disobey \Dis`o*bey"\, v. t. [imp. & p. p. Disobeyed; p. pr. &
   vb. n. Disobeying.] [F. d['e]sob['e]ir; pref. d['e]s- (L.
   dis-) + ob['e]ir. See Obey, and cf. Disobedient.]
   Not to obey; to neglect or refuse to obey (a superior or his
   commands, the laws, etc.); to transgress the commands of (one
   in authority); to violate, as an order; as, refractory
   children disobey their parents; men disobey their Maker and
   the laws.
   [1913 Webster]

         Not to disobey her lord's behest.        --Tennyson.
   [1913 Webster]