1. a person who refuses allegiance to, resists, or rises in arms against the government or ruler of his or her country.
2. a person who resists any authority, control, or tradition.
3. rebellious; defiant.
4. of or pertaining to rebels.
verb (used without object), re·bel.
5. to reject, resist, or rise in arms against one’s government or ruler.
6. to resist or rise against some authority, control, or tradition.