Learn how to say Moderator correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word moderator:
1an arbitrator or mediator:
Egypt managed to assert its role as a regional moderator
a presiding officer, especially a chairman of a debate:
the debates will each feature one moderator and a panel of three questioners
a Presbyterian minister presiding over an ecclesiastical body:
the newly elected Moderator of the Dutch Reformed Church
2British a person who reviews examination papers to ensure consistency, or otherwise oversees an examination:
after marking by the tutor, the papers are returned to a moderator
3a person who moderates an Internet forum or online discussion.
4 Physics a substance used in a nuclear reactor to retard neutrons:
in a fast reactor there is no moderator to slow the reaction down