es·​ker ˈe-skər How to pronounce esker (audio)
: a long narrow ridge or mound of sand, gravel, and boulders deposited by a stream flowing on, within, or beneath a stagnant glacier

Example Sentences

Recent Examples on the Web Among them: an esker, a long, sinuous ridge of gravel that formed as water flowed down into, and then under, glacial ice. Mary Divine, Twin Cities, 9 Sep. 2019 Try the Parnell segment for an especially hilly hike along glacial features including moraines, kettles, eskers and drumlins. Chelsey Lewis, Milwaukee Journal Sentinel, 17 May 2018 The area was formed by glaciers which changed the landscape, adding kettles and eskers, ridges and cliffs. Wisconsin Travel Best Bets, Milwaukee Journal Sentinel, 26 Sep. 2017 Debris dragged along the landscape deposited in rounded hills, or kames, along with steep ridges known as eskers and moraines; and deep holes were scooped from the earth to form kettles. Chelsey Lewis,, 15 June 2017 Six miles through classic glacial topography, the trail tiptoeing along steep moraines and eskers that plunged on both sides into deep kettles, and dipping and climbing between those moraines on rocky, root-rich soil. Chelsey Lewis,, 15 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'esker.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Irish eiscir ridge

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of esker was in 1848

Dictionary Entries Near esker

Cite this Entry

“Esker.” Dictionary, Merriam-Webster, Accessed 28 Nov. 2022.

Kids Definition



es·​ker ˈes-kər How to pronounce esker (audio)
: a long narrow mound of material (as sand or gravel) deposited by a stream flowing on, within, or beneath a melting glacier

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