superstorm From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA major storm (weather phenomenon). Related wordsSynonymsmegastormmega-stormperfect stormsupertempestsupertyphoonsupertornadosupercyclonesupermeteorsupercatastrophesupersurgecatastrophebig onethunderboomersuperlightningsuperquakesuperflood References Wiktionary — superstorm Wikipedia — superstorm