| n. | 1. | One who, or that which, moderates, restrains, or pacifies. |
| 2. | The officer who presides over an assembly or discussion to preserve order, propose questions, regulate the proceedings, and declare the votes. | |
| 3. | In the University of Oxford, an examiner for moderations; at Cambridge, the superintendant of examinations for degrees; at Dublin, either the first (senior) or second (junior) in rank in an examination for the degree of Bachelor of Arts. | |
| 4. | A mechanical arrangement for regulating motion in a machine, or producing equality of effect. |
| Noun | 1. | moderator - any substance used to slow down neutrons in nuclear reactors |
| 2. | moderator - in the Presdyterian church, the officer who presides over a synod or general assembly | |
| 3. | moderator - someone who presides over a forum or debate | |
| 4. | moderator - someone who mediates disputes and attempts to avoid violence |
MODERATOR. A person appointed to preside at a popular meeting; sometimes he is called a chairman.
| moderator - A person, or small group of people, who manages a moderated mailing list or Usenet newsgroup. Moderators are responsible for determining which email submissions are passed on to the list or newsgroup. |