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
Sujita Sinha, Interesting Engineering, 26 Sep. 2025
Rozwadowski analyzes his 1957 novel The Deep Range, in which a former astronaut takes a job on an undersea ranch.
—Danny Robb, JSTOR Daily, 26 Sep. 2025
Tsunamis are a series of giant waves caused by undersea earthquakes at tectonic plate boundaries, or volcanic eruptions.
—George Petras, USA Today, 18 Sep. 2025
MacVean rose up the ranks, eventually becoming executive officer of the USS Parche (SSN-683), which became famous in the Silent Service for tapping Soviet undersea communication cables and recovering Soviet missile fragments.
—Gary Robbins, San Diego Union-Tribune, 16 Sep. 2025
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Adjective
An undersea submersible has revealed crabs, worms, and fish living on World War II explosives in the Baltic Sea.
—Sujita Sinha, Interesting Engineering, 26 Sep. 2025
Rozwadowski analyzes his 1957 novel The Deep Range, in which a former astronaut takes a job on an undersea ranch.
—Danny Robb, JSTOR Daily, 26 Sep. 2025
Tsunamis are a series of giant waves caused by undersea earthquakes at tectonic plate boundaries, or volcanic eruptions.
—George Petras, USA Today, 18 Sep. 2025
MacVean rose up the ranks, eventually becoming executive officer of the USS Parche (SSN-683), which became famous in the Silent Service for tapping Soviet undersea communication cables and recovering Soviet missile fragments.
—Gary Robbins, San Diego Union-Tribune, 16 Sep. 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 30 Sep. 2025.
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