un·der·sea
ˌən-dər-ˈsē 
1
: being or carried on under the sea or under the surface of the sea
undersea oil deposits
undersea fighting
2
: designed for use under the surface of the sea
an undersea fleet
Examples of undersea in a Sentence
Adjective
They are conducting undersea research.
Recent Examples on the Web
PC Magazine, 19 July 2025
New rules will ban Chinese technology from use in undersea cables to the US, the communications regulator said.
—Ben Smith, semafor.com, 18 July 2025
An ambitious engineering project ‒ the world's longest and deepest undersea road tunnel ‒ is under construction in Norway.
—Stephen J. Beard, USA Today, 16 July 2025
The undersea data center concept seems to have growing appeal beyond China.
—You Xiaoying, Scientific American, 16 July 2025
See All Example Sentences for undersea
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Adjective
More recently, the agency pushed to ban Chinese companies and technology from undersea internet cables connected to the US.
—PC Magazine, 19 July 2025
New rules will ban Chinese technology from use in undersea cables to the US, the communications regulator said.
—Ben Smith, semafor.com, 18 July 2025
An ambitious engineering project ‒ the world's longest and deepest undersea road tunnel ‒ is under construction in Norway.
—Stephen J. Beard, USA Today, 16 July 2025
The undersea data center concept seems to have growing appeal beyond China.
—You Xiaoying, Scientific American, 16 July 2025
See All Example Sentences for undersea
Cite this Entry
“Undersea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undersea. Accessed 29 Jul. 2025.
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