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moderator
[ mod-uh-rey-ter ]
/ ËmÉd ÉËreÉȘ tÉr /
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noun
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.
Physics. a substance, as graphite or heavy water, used to slow neutrons to speeds at which they are more efficient in causing fission.
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Origin of moderator
OTHER WORDS FROM moderator
mod·er·a·to·ri·al [mod-er-uh-tawr-ee-uhl, -tohr-], /ËmÉd Ér ÉËtÉr i Él, -ËtoÊr-/, adjectivemod·er·a·tor·ship, nounWords nearby moderator
moderately, moderation, moderationist, Moderations, moderato, moderator, modern, modern apprenticeship, modern art, modern cut, modern dance
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use moderator in a sentence
British Dictionary definitions for moderator
moderator
/ (ËmÉdÉËreÉȘtÉ) /
noun
Derived forms of moderator
moderatorship, nounCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for moderator
moderator
[ mĆdâČÉ-rÄâČtÉr ]
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). Also called neutron moderator See also slow neutron.
The American HeritageÂź Science Dictionary
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