Moderator definition

mŏdə-rātər
Frequency:
One that moderates, as:
  • One that arbitrates or mediates.
  • One who presides over a meeting, forum, or debate.
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The person who presides over a synod of a Presbyterian Church.
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The officer who presides over a synod or general assembly of the Presbyterian Church.
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(physics) A substance, such as water or graphite, used in a nuclear reactor to decrease the speed of fast neutrons and increase the likelihood of fission.
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A person or thing that moderates.
  • A person who presides at a town meeting, debate, assembly, etc.
  • The presiding officer of a governing body, as of the Presbyterian Church.
  • A substance, as graphite or heavy water, used to slow down high-energy neutrons in a nuclear reactor.
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A substance, such as graphite, water, or heavy water, placed in a nuclear reactor to slow neutrons down to speeds at which they are more likely to be captured by fissionable components of a fuel (such as uranium-235) and less likely to be absorbed by nonfissionable components of a fuel (such as uranium-238).
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Someone who moderates.
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(physics) A substance (often water or graphite) used to decrease the speed of fast neutrons in a nuclear reactor and hence increase likelihood of fission.
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A device used to deaden some of the noise from a firearm, although not to the same extent as a suppressor or silencer.
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(UK) An examiner at Oxford and Cambridge universities.
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(Ireland) At the University of Dublin, either the first (seni) or second (juni) in rank in an examination for the degree of Bachelor of Arts.
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A mechanical arrangement for regulating motion in a machine, or producing equality of effect.
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Other Word Forms

Noun

Singular:
moderator
Plural:
moderators

Origin of moderator

  • From Latin moderator.

    From Wiktionary