Moderator

Part of speech: noun

Pronunciation: /ˈmɒdəˌɹeɪtə(ɹ)/

Definitions

1. An individual or entity tasked with guiding discussions, ensuring respectful exchanges, and regulating content to promote constructive dialogue while also functioning as a substance that controls nuclear fission processes
2. A person responsible for overseeing discussions to ensure order and fairness while also serving as a substance that mitigates the speed of nuclear reactions
3. A person who manages conversations or forums to keep discussions orderly and fair ; a material that slows down the rate of nuclear fission in reactors

Etymology: The Latin "moderator" meant a steerer or governor, someone who held the reins of something that might otherwise run out of control. It was built from "moderare," to keep within bounds, a verb tied to "modus," measure or limit. English took the word directly from Latin as a learned borrowing, and it appeared in Middle English as "moderatour," so the idea of a person who keeps things within limits was already in place when the word arrived. The modern sense, someone who chairs a debate or runs an online forum, is a natural extension of that original job of holding things in check. A moderator guides a discussion so it stays orderly and does not spin away from its purpose. The word's surface structure, "moderate" plus the agent ending "-or," reflects this same sense of one who moderates, though the Latin source is the direct route into English.

Synonyms: mediator, facilitator, referee, arbitrator, chairperson