1. a great flood or deluge; an overwhelming rush of water
Usage: archaic or literary; often used in historical or geological contexts
2. in geology, a deposit or formation attributed to a prehistoric flood
Usage: historical geological term; largely superseded by modern terminology

Examples

• The diluvion swept away entire villages in its path.
• Ancient texts describe a great diluvion that reshaped the landscape.
• Geologists once attributed certain rock formations to a universal diluvion.
• The diluvion of rain during the monsoon season caused widespread flooding.
• Early naturalists debated whether diluvion could explain the distribution of fossils.