From Longman Dictionary of Contemporary Englishrenegaderen‧e‧gade /ˈrenəɡeɪd/ noun [countable] literary BETRAYsomeone who leaves one side in a war, politics etc in order to join the opposing side – used to show disapproval a renegade army unit
Examples from the Corpus
renegade• Antinori has a reputation as a renegade because of his many successful efforts to help post-menopausal women become pregnant.• You talk of family and you mean one ruthless and callous renegade.• But how I would have preferred disaster to my role as rejected conspirator and failed renegade.• Alvin dressed in blue jeans, shirts and boots and looked like the renegade that he felt he was.Origin renegade (1400-1500) Spanish renegado, from Medieval Latin renegare “to say that something is not true”, from Latin negare; → NEGATE 