say it: MAH-dur-ay-tur
moderator is a noun meaning "any substance used to slow down neutrons in nuclear reactors". It carries 4 recorded senses.
any substance used to slow down neutrons in nuclear reactors
in the Presbyterian church, the officer who presides over a synod or general assembly
someone who presides over a forum or debate
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for moderator come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.