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un·​der·​sur·​face ˈən-dər-ˌsər-fəs How to pronounce undersurface (audio)


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un·​der·​sur·​face ˌən-dər-ˈsər-fəs How to pronounce undersurface (audio)
: existing or moving below the surface

Example Sentences

Noun painted the undersurface of the plane blue
Recent Examples on the Web
Scientists observed a beetle walking upside-down on the undersurface of a pool of water. New York Times, 26 July 2021 The spots enlarge and are mirrored on the undersurface of the leaf with a white downy growth. The Editors Of Organic Life, Good Housekeeping, 21 July 2015 When the undersurface of the first tablet was revealed, Dr. White got chills. Joanna Klein, New York Times, 7 Mar. 2017
Storms larger than planets, moons with undersurface oceans, lakes of methane, worldlets that occasionally swap places... ... Phil Plait, Discover Magazine, 2 Nov. 2011

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

Word History

First Known Use


1733, in the meaning defined above


circa 1934, in the meaning defined above

Time Traveler
The first known use of undersurface was in 1733

Dictionary Entries Near undersurface

Cite this Entry

“Undersurface.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undersurface. Accessed 27 Mar. 2023.

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