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
Ramin Skibba, Scientific American, 27 May 2026
The region is also host to a number of undersea cable projects that hold strategic value.
—Stephen Groves, Los Angeles Times, 22 May 2026
Britain said the ship was being used for gathering intelligence and mapping undersea cables.
—CBS News, 20 May 2026
But undersea cables in the Red Sea have already seen a spate of damage in recent years, exacerbated by lengthy repair times and attacks by Houthi rebels allied with Iran.
—Jeremy Hsu, ArsTechnica, 19 May 2026
See All Example Sentences for undersea
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Adjective
Cable landing stations along the coast are exposed to drone attacks in a way that undersea cables are not, and Iran could target those without necessarily risking its own connections.
—Ramin Skibba, Scientific American, 27 May 2026
The region is also host to a number of undersea cable projects that hold strategic value.
—Stephen Groves, Los Angeles Times, 22 May 2026
Britain said the ship was being used for gathering intelligence and mapping undersea cables.
—CBS News, 20 May 2026
But undersea cables in the Red Sea have already seen a spate of damage in recent years, exacerbated by lengthy repair times and attacks by Houthi rebels allied with Iran.
—Jeremy Hsu, ArsTechnica, 19 May 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 3 Jun. 2026.
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