1. not controlled by or obeying laws; characterized by a lack of law and order
2. not restrained or controlled by law; illegal

Examples

• The frontier town was known for its lawless atmosphere.
• Gangs roamed the lawless streets after the government collapsed.
• The dictator’s lawless regime ignored international treaties.
• Pirates created a lawless society on the remote island.
• The company’s lawless business practices led to federal charges.
• Vigilantes took lawless action into their own hands.
• The lawless behavior of the mob shocked the peaceful community.