Legal Definition of Authority: (a) The power and right to do a certain act. (b) A person who has been given certain powers and rights | Gain a comprehensive understanding of the legal definition of authority and its power and rights. Learn how authority is categorized and the importance it holds in decision-making, accountability, legal compliance, and efficient operations. Explore examples of authority in corporate, legal, and parental settings. Establish a strong foundation for your business by understanding and respecting authority