sea·​wa·​ter | \ ˈsē-ˌwȯ-tər How to pronounce seawater (audio) , -ˌwä- \

Definition of seawater

: water in or from the sea

Examples of seawater in a Sentence

Recent Examples on the Web Falling levels of iron in seawater were loosening the grip of mussels. Rafil Kroll-zaidi, Harper's Magazine, "Findings," 15 Sep. 2020 Coastal cities including Miami spend huge sums of money to mitigate the invasion of seawater. Star Tribune, "Readers Write: Climate change, diversity training, COVID-19," 14 Sep. 2020 New studies show fractures on surface ice and warm seawater melting the ice from underneath. Eric Niiler, Wired, "Antarctic Glaciers Are Growing Unstable Above and Below Water," 14 Sep. 2020 The neighborhood’s drainage system was pummeled by waves of excess seawater. David Walter, Washington Post, "As floods, fires and extreme temperatures worsen, these designers are making the case for resilient building," 14 Sep. 2020 Warming Up Albedo is a measure of the planet’s reflectivity, which, sadly, is decreasing, as white Arctic ice changes to blue seawater. Bill Mckibben, The New Yorker, "With a New Pipeline in East Africa, an Oil Company Flouts France’s Leadership on Climate," 10 Sep. 2020 There’s nothing more poetic than eating seafood while perched on the breezy cliffs that surround the bay, taking in the scent of seawater and steamed crab. Janelle Bitker,, "11 San Francisco and Bay Area restaurants offering prime picnic options," 3 Sep. 2020 These pigments can give off a reddish color when millions of cells are concentrated in seawater along the coast. David L. Coddon, San Diego Union-Tribune, "Arts & Culture Newsletter: Go behind the scenes with Elton John at the Troubadour," 3 Sep. 2020 Plant species that thrive in freshwater suggest wet periods, as heavy runoff from the mountains crowds out seawater. Tom Philpott, Wired, "The Biblical Flood That Will Drown California," 29 Aug. 2020

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

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First Known Use of seawater

before the 12th century, in the meaning defined above

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The first known use of seawater was before the 12th century

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Statistics for seawater

Last Updated

18 Sep 2020

Cite this Entry

“Seawater.” Dictionary, Merriam-Webster, Accessed 18 Sep. 2020.

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More Definitions for seawater


How to pronounce seawater (audio)

English Language Learners Definition of seawater

: water in or from the sea


sea·​wa·​ter | \ ˈsē-ˌwȯ-tər How to pronounce seawater (audio) , -ˌwä- \

Kids Definition of seawater

: water in or from the sea

More from Merriam-Webster on seawater

Nglish: Translation of seawater for Spanish Speakers Encyclopedia article about seawater

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