📒 a person whose job is to help people or groups who disagree to reach an agreement
📒 a person whose job is to make sure that a discussion or a debate is fair
📒 a person whose job is to make sure that an exam is marked fairly
📒 a person whose job is to make sure that the rules are followed in a discussion on the internet, especially in order to prevent offensive material from being published
📒 a religious leader in the Presbyterian Church who is in charge of the Church council