1. a depressed segment of the earth’s crust bounded on at least two sides by faults
Usage: geology

Examples

• The Rhine Valley is a well-known graben in Europe.
• Geologists studied the fault lines that formed the graben.
• The graben was created by tectonic forces pulling the earth’s crust apart.
• Oil deposits are sometimes found in graben structures.
• The East African Rift System contains several large grabens.
• Sediments accumulated in the graben over millions of years.