Rebel
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
The name of rebels is given to nil subjects who unjustly take up arms against the ruler of the society, [or the lawful and constitutional government,] whether their view be to deprive him of the supreme authority or to resist his lawful commands in some particular instance, and to impose conditions on him. Vatt. Law Nat. bk.
3, § 288.