Noah Webster's New International Dictionary of the English Language

1. (v. t.) 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.

2. (v. i.) To refuse or neglect to obey; to violate commands; to be disobedient.