cataclysm meaning and definition

CATACLYSM noun

Definition of cataclysm (noun)

1. a sudden violent change in the earth's surface
   • synonyms: catastrophe
2. an event resulting in great loss and misfortune
   • "the whole city was affected by the irremediable calamity"; "the earthquake was a disaster"
   • synonyms: calamity, catastrophe, disaster, tragedy