Definition: "Archpriestship," in the Bible, refers to an elevated spiritual role that involves a priest's service as a royal or holy representative. It is typically held by a king or other high-ranking figure who serves as the head of the kingdom or church, often appointed at the age of 20 and confirmed through baptism. The term signifies the highest religious leadership position in ancient Israel, symbolizing a place of privilege and authority over priests and their responsibilities.