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
Todd Karpovich, Baltimore Sun, 6 Aug. 2025
Encircled by a vivid undersea mural, the History of Diving Museum showcases thousands of artifacts tracing 4,000 years of underwater exploration.
—Carrie Honaker, Travel + Leisure, 5 Aug. 2025
The warships, which are equipped for undersea warfare and air defence, will replace Australia’s Anzac-class frigates.
—Lee Ying Shan, CNBC, 4 Aug. 2025
The ship is designed to collect undersea acoustic data in support of anti-submarine warfare development.
—Ryan Chan, MSNBC Newsweek, 1 July 2025
See All Example Sentences for undersea
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Adjective
While satellites handle some data transmission, undersea cables are critical for cloud computing, streaming services, and everyday internet use, according to the Center for Strategic and International Studies.
—Todd Karpovich, Baltimore Sun, 6 Aug. 2025
Encircled by a vivid undersea mural, the History of Diving Museum showcases thousands of artifacts tracing 4,000 years of underwater exploration.
—Carrie Honaker, Travel + Leisure, 5 Aug. 2025
The warships, which are equipped for undersea warfare and air defence, will replace Australia’s Anzac-class frigates.
—Lee Ying Shan, CNBC, 4 Aug. 2025
The ship is designed to collect undersea acoustic data in support of anti-submarine warfare development.
—Ryan Chan, MSNBC Newsweek, 1 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 19 Aug. 2025.
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