underwater

adjective

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Since Kyiv's attacks on the bridge, Moscow has tried to implement repairs, fortifying it with underwater barriers and reportedly redeploying air defense systems, including the Pantsir-S1 air defense system, to shield it. William Lambers, Newsweek, 9 Mar. 2025 During his visits to the shipyards, Kim said that North Korea aims to modernize water-surface and underwater warships simultaneously. Hyung-Jin Kim, Chicago Tribune, 8 Mar. 2025 The vehicle was about a few feet within the spot his model predicted - 50 feet underwater and seven feet under the river floor. Saleen Martin, USA TODAY, 7 Mar. 2025 The underwater mountains of the northwest Pacific are dotted with various types of coral, sponges and plants. Irene Wright, Miami Herald, 7 Mar. 2025 See All Example Sentences for underwater

Word History

First Known Use

1627, in the meaning defined at sense 1

Time Traveler
The first known use of underwater was in 1627

Browse Nearby Words

Cite this Entry

“Underwater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underwater. Accessed 25 Mar. 2025.

Kids Definition

underwater

adjective
: lying, growing, worn, performed, or operating below the surface of the water
underwater plants
an underwater cave
underwater
-ˈwȯt-
-ˈwät-
adverb

Legal Definition

underwater

adjective
un·​der·​wa·​ter
1
: owing more on a mortgage loan than the property securing the loan is worth
underwater homeowners
2
: being or relating to a mortgage loan in which more is owed than the property securing the loan is worth
underwater mortgages
underwater properties

More from Merriam-Webster on underwater

Last Updated: - Updated example sentences
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