Definition of moderator
1 : one who arbitrates : mediator
2 : one who presides over an assembly, meeting, or discussion: such asa : the presiding officer of a Presbyterian governing bodyb : the nonpartisan presiding officer of a town meetingc : the chairman of a discussion group
3 : a substance (as graphite) used for slowing neutrons in a nuclear reactor
moderatorshipplay \-ˌship\ noun
Examples of moderator in a sentence
The moderator allowed audience members to ask the governor questions.
She acts as the moderator in our office meetings.
First Known Use of moderator
MODERATOR Defined for English Language Learners
Definition of moderator for English Language Learners
: someone who leads a discussion in a group and tells each person when to speak : someone who moderates a meeting or discussion
Medical Definition of moderator
: a substance (as graphite, deuterium in heavy water, or beryllium) used for slowing down neutrons in a nuclear reactor
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