1. Someone who argues for a cause: "She has been a supporter, a defender, and an advocate of civil rights for many years and her husband has also been a tireless advocate of social reform."
2. People who plead in behalf or others or who are intercessors: "They have been advocates for abused children and spouses in a variety of media and in social movements."
3. A lawyer is also known to be an advocate, who pleads in another person's case in a legal court."

1. A person who pleads for a cause or propounds an idea.
2. Someone who supports or speaks in favor of something or someone.
3. A lawyer who pleads cases in court.
4. To speak, to plead, or to argue in favor of something or someone.