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
Amir Husain, Forbes.com, 3 Sep. 2025
Much like the other two Vista hotels—one in Como city, another in Verona—the bathrooms are improbably chic, outfitted in slabs of marble in clarets, undersea greens, or the blue-gray-gold multicolor seen in astrophotography.
—Nicole Trilivas, Travel + Leisure, 2 Sep. 2025
Such strategies could give China a significant tactical advantage in future undersea operations, the South China Morning Post reported.
—Bojan Stojkovski, Interesting Engineering, 31 Aug. 2025
The destroyers’ arsenal centers on a 96-cell vertical launch system that can be loaded with a mix of weapons, including Tomahawk cruise missiles for long-range land attacks, standard missiles for air and missile defense, and anti-submarine rockets for undersea warfare.
—Jay Weaver, Miami Herald, 23 Aug. 2025
See All Example Sentences for undersea
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Adjective
There have also been references to the UUV’s capability to interdict undersea cables.
—Amir Husain, Forbes.com, 3 Sep. 2025
Much like the other two Vista hotels—one in Como city, another in Verona—the bathrooms are improbably chic, outfitted in slabs of marble in clarets, undersea greens, or the blue-gray-gold multicolor seen in astrophotography.
—Nicole Trilivas, Travel + Leisure, 2 Sep. 2025
Such strategies could give China a significant tactical advantage in future undersea operations, the South China Morning Post reported.
—Bojan Stojkovski, Interesting Engineering, 31 Aug. 2025
The destroyers’ arsenal centers on a 96-cell vertical launch system that can be loaded with a mix of weapons, including Tomahawk cruise missiles for long-range land attacks, standard missiles for air and missile defense, and anti-submarine rockets for undersea warfare.
—Jay Weaver, Miami Herald, 23 Aug. 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 9 Sep. 2025.
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