Renegade (noun)

1. A person who deserts and betrays an organization, country, or group to which he or she previously belonged.
2. A person who rejects or defies authority or traditional beliefs.

Origin:

From the spanish renegado, from renegar meaning "to deny or renounce".

Examples:

1. The soldier was considered a renegade when he deserted his unit.
2. The politician was considered a renegade when he broke away from his party's platform.
3. The bandit was considered a renegade when he turned against his own gang.
4. The scientist was considered a renegade when he rejected the mainstream scientific theories.
5. The artist was considered a renegade when she broke away from the traditional art forms.