Definition of graben
: a depressed segment of the crust of the earth or a celestial body (as the moon) bounded on at least two sides by faults
Origin and Etymology of graben
German, ditch, from Old High German grabo, from graban to dig — more at grave
First Known Use: 1896
Seen and Heard
What made you want to look up graben? Please tell us where you read or heard it (including the quote, if possible).