moderator

n. mediator, arbitrator, intermediary; person who is responsible for a newsgroup or mailing list on the Internet and for checking the messages before sending them to the group (Computers)

Moderator, a Latin word for manager, ruler, director, can refer to:Moderator provinciae, the title of certain Roman provincial governors.a Scots and (originally) Scottish English, gender-neutral word that approximates  chairman, someone who convenes, heads and "moderates" the discussion in a meeting, such as the nonpartisan presiding officer of a town meeting The chairperson of a church court in Presbyterian churches; this includes Moderator of the General Assembly, Moderators and clerks in the Church of Scotland, Moderator of the General Assembly of the Church of Scotland, and Moderators of the General Assembly of the Presbyterian Church (USA).The presiding bishop of the Church of North India, Church of South India, Church of Bangladesh, and Church of Pakistan.A position in some Roman Catholic organizations, including the Apostleship of Prayer; and compounds such as moderator general in the Cistercian Order.Forum moderator, one who oversees discussions on an Internet forum.Neutron moderator, a medium that reduces the velocity of neutrons.Cornell Moderator, a student-run political publication at Cornell University.A Master of CeremoniesModerator variable in statisticsOn Usenet, the moderator of a moderated newsgroup can approve or refuse articles.
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Noun
1. any substance used to slow down neutrons in nuclear reactors
(hypernym) inhibitor
(hyponym) heavy water, deuterium oxide
(part-holonym) nuclear reactor, reactor
2. in the Presdyterian church, the officer who presides over a synod or general assembly
(hypernym) presiding officer
3. someone who presides over a forum or debate
(hypernym) presiding officer
(derivation) moderate, chair, lead
4. someone who mediates disputes and attempts to avoid violence
(hypernym) mediator, go-between, intermediator, intermediary, intercessor
(hyponym) modifier
(derivation) chasten, moderate, temper

n. presenter, program host, broadcaster

n. moderator