moderator: Meaning and Definition of


Pronunciation: (mod'u-rā"tur), [key]
— n.
  1. a person or thing that moderates.
  2. a person who presides over a panel discussion on radio or television.
  3. a presiding officer, as at a public forum, a legislative body, or an ecclesiastical body in the Presbyterian Church.
  4. a substance, as graphite or heavy water, used to slow neutrons to speeds at which they are more efficient in causing fission.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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