An elongated hill or ridge of glacial drift.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "drumlin" in a sentence
"Cook Inlet is level to rolling, with areas of ground moraine and stagnant ice topography, drumlin fields, eskers, and outwash plains."
"One of the biggest maybe the biggest? drumlin fields on the planet."
"But I looked at the rolling drumlin scenery around me, unchanged in generations, and thought that the dangers they would be face would be few."