Advocate

1. To plead in favor of; to defend by argument, before a tribunal or the public; to support, vindicate, or recommend publicly.
2. One who defends, vindicates, or espouses any cause by argument; a pleader; as, an advocate of free trade, an advocate of truth.
3. One who pleads the cause of another. Specifically: One who pleads the cause of another before a tribunal or judicial court; a counselor.
4. Christ, considered as an intercessor.