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

Rising seawaters and an increase in nutrients from river sources, such as the Amazon River, make its way to the sea, causing the sargassum to increase in growth. Marcus Lim,, "Sargassum seaweed staying on our beaches — indefinitely, study says," 5 July 2019 Vibrio infections occur when someone eats raw or undercooked seafood or when an open wound becomes wet with seawater or brackish water. Susan Scutti, CNN, "Maryland boy victim of flesh-eating bacteria after a swim off the coast of Maryland," 3 July 2019 The proximity to the harbor also means MRS3 is being designed to deal with the elements, including seawater and salt corrosion. Sean Gallagher, Ars Technica, "Why a former Nazi sub base in Marseille is becoming a data center," 25 June 2019 The instruments are mounted on a low-flying plane and together make up the Global Airborne Observatory, which effectively can peel back the seawater and map the seafloor to a depth of 50 feet, in three dimensions. Paul Tullis, New York Times, "To Map a Coral Reef, Peel Back the Seawater," 10 June 2019 In Bangladesh, for example, rice agriculture is increasingly impossible as fields are flooded with seawater. Adam Moolna, Quartz India, "How mangroves could protect us from storms like Cyclone Fani," 7 June 2019 The $22 billion statewide estimate, the report states, represents just about 10 percent to 15 percent of the total cost of addressing chronic flooding and seawater inundation. San Diego Union-Tribune, "Paying the toll on sea level rise," 20 June 2019 Lying on her back, her feet to the ocean, Talibart used telescopic lenses and an ultra-fast 1,000 frames/second shutter speed to capture the towers and troughs of foam-flecked seawater. Michael Hardy, WIRED, "You've Never Seen Waves Like This Before," 31 May 2018 To get their samples, the researchers used ROVs outfitted with specialized samplers, which pumped large volumes of seawater through a mesh filter. Matt Simon, WIRED, "Monterey Bay Is a Natural Wonder—Poisoned With Microplastic," 6 June 2019

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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Statistics for seawater

Last Updated

11 Jul 2019

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Time Traveler for seawater

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

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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

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More from Merriam-Webster on seawater

Rhyming Dictionary: Words that rhyme with seawater

Spanish Central: Translation of seawater

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

Comments on seawater

What made you want to look up seawater? Please tell us where you read or heard it (including the quote, if possible).


appealing forcibly to the mind or reason

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