- a person or thing that moderates.
- a person who presides over a panel discussion on radio or television.
- a member of an online message board or electronic mailing list with privileges and responsibilities to approve or reject messages and uphold the terms of service.
- a presiding officer, as at a public forum, a legislative body, or an ecclesiastical body in the Presbyterian Church.
- a substance, as graphite or heavy water, used to slow neutrons to speeds at which they are more efficient in causing fission.
- a person or thing that moderates
- a minister appointed to preside over a Church court, synod, or general assembly
- a presiding officer at a public or legislative assembly
- a material, such as heavy water or graphite, used for slowing down neutrons in the cores of nuclear reactors so that they have more chance of inducing nuclear fission
- an examiner at Oxford or Cambridge Universities in first public examinations
- (in Britain and New Zealand) one who is responsible for consistency of standards in the grading of some educational assessments
- a person who monitors the conversations in an on-line chatroom for bad language, inappropriate content, etc
