(1):
(v. i.) Pertaining to rebels or rebellion; acting in revolt; rebellious; as, rebel troops.
(2):
(v. i.) To renounce, and resist by force, the authority of the ruler or government to which one owes obedience. See Rebellion.
(3):
(v. i.) To be disobedient to authority; to assume a hostile or insubordinate attitude; to revolt.
(4):
(n.) One who rebels.