moderator

 
Pronunciation: /ˈmɒdəreɪtə/

noun

  • 1an arbitrator or mediator: Egypt managed to assert its role as a regional moderator
  • a presiding officer, especially a chairman of a debate: the debates will each feature one moderator and a panel of three questioners
  • a Presbyterian minister presiding over an ecclesiastical body: the newly elected Moderator of the Dutch Reformed Church
  • 2British a person who reviews examination papers to ensure consistency, or otherwise oversees an examination: after marking by the tutor, the papers are returned to a moderator
  • 3a person who moderates an Internet message board or chat room.
  • 4 Physics a substance used in a nuclear reactor to retard neutrons: in a fast reactor there is no moderator to slow the reaction down

Derivatives

moderatorship

noun