- n. 大洪水；地震；(社会政治的)大变动
a sudden violent change in the earth's surface
an event resulting in great loss and misfortune;
"the whole city was affected by the irremediable calamity"
"the earthquake was a disaster"
- The cataclysm flooded the entire valley.
- A cataclysm caused by the dam breaking.
- No cataclysm has desolated the whole world.
- World War II was a cataclysm for all of Europe.
- The Great Depression was an economic cataclysm on a scale hard to imagine.