underwater
adjective
un·der·wa·ter
ˌən-dər-ˈwȯ-tər 
-ˈwä-
1
: lying, growing, worn, performed, or operating below the surface of the water
underwater plants
2
: being below the waterline of a ship
3
a
: having, relating to, or being a mortgage loan for which more is owed than the property securing the loan is worth
b
: having, relating to, or being a stock option for which the price of the option is higher than the current market value of the stock
underwater
adverb
Examples of underwater in a Sentence
underwater plants don't require as much light to grow as surface plants
a vessel designed for underwater exploration
Recent Examples on the Web
Trump is slightly underwater on immigration in the RealClearPolitics polling average, a change from earlier in his second term.
—
W. James Antle Iii, The Washington Examiner, 12 July 2025
In 1974, architects designed an underwater research station where people would be able to communicate with dolphins.
—Eva Amsen, Forbes.com, 11 July 2025
Within its pages are interesting facts about and images of nature's most beautiful underwater paradises, where our planet's vitality explodes in a cascade of underwater shapes and colors.
—Simon Hill, Wired News, 11 July 2025
What was appealing about the 2018 film — its goofy sense of humor, its willingness to cast people like Dolph Lundgren to play an underwater king — is less endearing this time around, especially when the rest of the trappings are so familiar from approximately 15,634,523 other comic-book flicks.
—Tim Grierson, Vulture, 11 July 2025
See All Example Sentences for underwater
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W. James Antle Iii, The Washington Examiner, 12 July 2025
In 1974, architects designed an underwater research station where people would be able to communicate with dolphins.
—Eva Amsen, Forbes.com, 11 July 2025
Within its pages are interesting facts about and images of nature's most beautiful underwater paradises, where our planet's vitality explodes in a cascade of underwater shapes and colors.
—Simon Hill, Wired News, 11 July 2025
What was appealing about the 2018 film — its goofy sense of humor, its willingness to cast people like Dolph Lundgren to play an underwater king — is less endearing this time around, especially when the rest of the trappings are so familiar from approximately 15,634,523 other comic-book flicks.
—Tim Grierson, Vulture, 11 July 2025
See All Example Sentences for underwater
Cite this Entry
“Underwater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underwater. Accessed 20 Jul. 2025.
Copy CitationKids Definition
underwater
adjective
un·der·wa·ter
ˈən-dər-ˈwȯt-ər
-ˈwät-
: lying, growing, worn, performed, or operating below the surface of the water
underwater plants
an underwater cave
underwater
adverb
-ˈwȯt-
-ˈwät-
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