moderator

noun (n)

1. any substance used to slow down neutrons in nuclear reactors (noun.substance)

   Sumber: wordnet30

2. in the Presbyterian church, the officer who presides over a synod or general assembly (noun.person)

   Sumber: wordnet30

3. someone who presides over a forum or debate (noun.person)

   Sumber: wordnet30

4. someone who mediates disputes and attempts to avoid violence (noun.person)

   Sumber: wordnet30

5. One who, or that which, moderates, restrains, or pacifies. (noun)

   Sumber: webster1913