1. a unit of energy or work in the centimeter-gram-second system
Usage: physics; technical
2. a large area of sand dunes in a desert
Usage: geography

Examples

• The physicist calculated the energy in ergs.
• One joule equals ten million ergs.
• The experiment measured forces in dynes and energy in ergs.
• The Sahara contains several large ergs.
• Wind patterns shape the dunes in the erg.
• Travelers crossed the vast erg on camels.
• The erg stretched endlessly toward the horizon.