Because they didn't need to be arrested by a police officer or other official, pursuing outlaws was once a way to earn reward money. The outlaw figure became. Define outlaw: a person who has broken the law and who is hiding or running away to avoid punishment — outlaw in a sentence. c. A rebel; a nonconformist: a social outlaw. 2. A person excluded from normal legal protection and rights. 3. A wild or vicious horse or other animal.