moderator
nounUK /ˈmɒdəreɪtə/
US /ˈmɑːdəreɪtər/
A person who helps people talk together and keeps things calm and fair.
The moderator asked each student to share their idea one at a time.
RELATED WORDS
OTHER MEANINGS
2. A person who checks messages and posts on a website to make sure rules are followed.
The forum moderator removed the rude comment.
3. A substance that slows down a nuclear reaction.
Water is used as a moderator in some nuclear reactors.
4. A person who makes sure a test or exam is fair and follows the rules.
The exam moderator checked all the papers before they were marked.