1. elongated hills formed by glacial action, typically composed of glacial sediment and having a steep side facing the direction from which the glacier advanced
Usage: geology

Examples

• The landscape was dotted with drumlins left behind by the retreating ice sheet.
• Geologists studied the drumlins to understand the direction of ancient glacial movement.
• The farm was built on top of one of the many drumlins in the region.
• Drumlins are common features in areas that were once covered by continental glaciers.
• The elongated shape of drumlins indicates the flow direction of the ice that formed them.
• Boston’s Beacon Hill is a famous example of a drumlin that has been modified by human activity.