1.NounA person who resists an established authority, often violently.
"A group of rebels defied the general's orders and split off from the main army.; My little sister is such a rebel - coming home late, piercing her ears, and refusing to do any of her chores."
2.NounSynonym of Confederate: a citizen of the Confederate States of America, especially a Confederate soldier.
3.VerbTo resist or become defiant toward an authority.
"to rebel against the system"
4.VerbTo forcefully subvert the law of the land in an attempt to replace it with another form of government.