: a hill or ridge of sand piled up by the wind
Examples of dune in a Sentence
We wandered over the dunes.
Recent Examples on the Web
Visitors can hike, drive, and even slide down the dunes, which are estimated to be between 10,000 and 15,000 years old.
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Evie Carrick, Travel + Leisure, 7 Jan. 2026
Some towns use trees for dune reinforcement or to prevent erosion (always check with local authorities before leaving your tree on the beach).
—Brandee Gruener, Southern Living, 3 Jan. 2026
This biological soil crust immobilizes shifting dunes and establishes a nutrient-rich substrate essential for the successional development of plant life.
—Mrigakshi Dixit, Interesting Engineering, 1 Jan. 2026
All around, empty orange dunes rippled under an azure sky, a still-life sea of sand baking under the burning sun.
—Angus MacKenzie, Robb Report, 31 Dec. 2025
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Cite this Entry
“Dune.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dune. Accessed 20 Jan. 2026.
Kids Definition
dune
noun
: a hill or ridge of sand piled up by the wind
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