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
Kaif Shaikh, Interesting Engineering, 6 June 2026
Iran, meanwhile, has suggested charging tolls on the data passing through cables off its shores, the author of a book on the undersea network noted; cables in the Strait of Hormuz carry about 20% of global data flow, giving Tehran another point of leverage over Washington.
—Tom Chivers, semafor.com, 4 June 2026
The base near Buxton was home to an undersea surveillance station starting in the late 1950s, the National Park Service says.
—Mark Price
june 4, Charlotte Observer, 4 June 2026
Across undersea cables, satellite arrays, and AI data hubs, global precautions are still in their infancy.
—Ken Silverstein, Forbes.com, 1 June 2026
See All Example Sentences for undersea
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Adjective
Why Europe is investing in unmanned submarine hunting The announcement comes amid growing concern across Europe over undersea security.
—Kaif Shaikh, Interesting Engineering, 6 June 2026
Iran, meanwhile, has suggested charging tolls on the data passing through cables off its shores, the author of a book on the undersea network noted; cables in the Strait of Hormuz carry about 20% of global data flow, giving Tehran another point of leverage over Washington.
—Tom Chivers, semafor.com, 4 June 2026
The base near Buxton was home to an undersea surveillance station starting in the late 1950s, the National Park Service says.
—Mark Price
june 4, Charlotte Observer, 4 June 2026
Across undersea cables, satellite arrays, and AI data hubs, global precautions are still in their infancy.
—Ken Silverstein, Forbes.com, 1 June 2026
See All Example Sentences for undersea
Cite this Entry
“Undersea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undersea. Accessed 12 Jun. 2026.
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