1. Extremely arid; having very little rainfall and extremely dry conditions, typically receiving less than 100 millimeters of precipitation annually.
Usage: technical/scientific; used in climatology and geography

Examples

• The Atacama Desert in Chile is one of the most hyperarid regions on Earth.
• Hyperarid climates support very little vegetation and animal life.
• Scientists study hyperarid environments to understand how life adapts to extreme conditions.
• The hyperarid landscape of the Atacama has remained virtually unchanged for millions of years.
• Hyperarid regions receive so little rain that some areas may not see precipitation for decades.