Legal Definition of Proxies: (a) An individual authorized to act for another. A Proxy acts as a substitute or a representative. A Proxy can be authorized to vote for a shareholder of a corporation. In some states, a Proxy can be authorized to make health care decisions for another. (b) The document which authorizes an individual to act for another | Learn about the legal definition of proxies and their importance in business and law. Discover how proxies act as substitutes or representatives for principals, making decisions and carrying out tasks on their behalf. Find out about the proxy document, which outlines the specific powers and responsibilities of the proxy and serves as proof of their authorization. With proxies, individuals and entities can ensure that their interests and rights are protected, even if they are unable to personally attend to their obligations. Explore how proxies are used in various legal and business situations, including corporate meetings and healthcare decision-making