moderator

noun mod·er·a·tor \ ˈmä-də-ˌrā-tər \
Updated on: 16 Nov 2017

Definition of moderator

1 :one who arbitrates :mediator
2 :one who presides over an assembly, meeting, or discussion: such as
a :the presiding officer of a Presbyterian governing body
b :the nonpartisan presiding officer of a town meeting
c :the chairman of a discussion group
3 :a substance (such as graphite) used for slowing neutrons in a nuclear reactor

moderatorship

play \-ˌship\ noun

Examples of moderator in a Sentence

  1. The moderator allowed audience members to ask the governor questions.

  2. She acts as the moderator in our office meetings.

Recent Examples of moderator from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'moderator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of moderator

circa 1560


MODERATOR Defined for English Language Learners

moderator

noun

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 Dictionary

moderator

noun mod·er·a·tor \ ˈmäd-ə-ˌrāt-ər \

medical Definition of moderator

:a substance (as graphite, deuterium in heavy water, or beryllium) used for slowing down neutrons in a nuclear reactor


Seen and Heard

What made you want to look up moderator? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to praise usually to excess

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!