un·​der·​wa·​ter | \ ˌən-dər-ˈwȯ-tər How to pronounce underwater (audio) , -ˈwä- \

Definition of underwater

1 : lying, growing, worn, performed, or operating below the surface of the water underwater plants
2 : being below the waterline of a ship
3a : 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

Other Words from underwater

underwater adverb

Synonyms for underwater


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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 As many as half-a-million barrels could still be underwater today, according to old records and a UC Santa Barbara study. Los Angeles Times, 18 May 2022 The streets, which used to teem with tourists and neighborhood folks, were empty, with a stillness that felt like being underwater. Susan Orlean, The New Yorker, 18 May 2022 Washington: In 100 years, if nothing is done, the historic Tidal Basin may be underwater, WUSA-TV reports. From Usa Today Network And Wire Reports, USA TODAY, 17 May 2022 About 80% of Falmouth will be underwater, even as high as 10 feet in some portions of town. Emily Deletter, The Enquirer, 12 May 2022 Bitcoin is now down nearly 55 percent from its November high, and 40 percent of people who have invested in the digital currency are now underwater, CNBC reports, citing new data from Glassnode. Harold Maass, The Week, 10 May 2022 But small and overlooked only adds to its appeal — especially for divers who have discovered the Dutch island's flourishing underwater world. Travel + Leisure, 3 Apr. 2022 Many purchasers of Otherdeeds, the virtual land that sparked a buying frenzy last weekend and led to skyrocketing transaction fees on Ethereum, are underwater as prices dropped after the initial euphoria wore off. Olga Kharif, Fortune, 4 May 2022 And in the 19th century, areas of the green space were underwater thanks to the new nation’s growing canal system. Jane Recker, Smithsonian Magazine, 29 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'underwater.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of underwater

1627, in the meaning defined at sense 1

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Time Traveler for underwater

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The first known use of underwater was in 1627

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Last Updated

22 May 2022

Cite this Entry

“Underwater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underwater. Accessed 25 May. 2022.

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More Definitions for underwater


un·​der·​wa·​ter | \ ˈən-dər-ˈwȯ-tər How to pronounce underwater (audio) , -ˈwä- \

Kids Definition of underwater

 (Entry 1 of 2)

: lying, growing, worn, performed, or operating below the surface of the water an underwater cave underwater somersaults


un·​der·​wa·​ter | \ ˌən-dər-ˈwȯ-tər How to pronounce underwater (audio) , -ˈwä- \

Kids Definition of underwater (Entry 2 of 2)

: under the surface of the water I like to swim underwater.



Legal Definition of underwater

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

Nglish: Translation of underwater for Spanish Speakers

Britannica English: Translation of underwater for Arabic Speakers


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