- 1a person who fights against the government of their country rebel forces Armed rebels advanced toward the capital. Some parts of the country fell into rebel hands.
- 2 a person who opposes someone in authority over them within an organization, a political party, etc. A number of Republican rebels are planning to vote against the president's proposal.
- 3a person who does not like to obey rules or who does not accept normal standards of behavior, dress, etc. I've always been the rebel of the family. He was a rebel in his teens but he's a respectable citizen these days.