/ ˈmɒdəreɪtə(r); NAmE ˈmɑːd-/ noun
1.
a person whose job is to help the two sides in a disagreement to reach an agreement
—see also mediator
2.
( especially NAmE ) a person whose job is to make sure that a discussion or a debate is fair
3.
( BrE ) a person whose job is to make sure that an exam is marked fairly
4.
Moderator a religious leader in the Presbyterian Church who is in charge of the Church council
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WORD ORIGIN
late Middle English : Latin .