seawater

noun

sea·​wa·​ter ˈsē-ˌwȯ-tər How to pronounce seawater (audio)
-ˌwä-
: water in or from the sea

Examples of seawater in a Sentence

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.
In 2018, Microsoft deployed a submarine-like data center 117 feet below sea level to take advantage of the cooling benefits of seawater and tidal power to enable the project to be powered fully by renewable energy. April Roach, CNBC, 29 Dec. 2025 Generating long-range electric fields in seawater is inherently difficult because seawater is highly conductive. IEEE Spectrum, 18 Dec. 2025 The rainwater is said to have mixed with mineral-rich sediment and seawater, creating a vivid, blood-red scene. Emma Bussey, FOXNews.com, 18 Dec. 2025 Aida and his team aimed to design a plastic that responds naturally to seawater without complex processing. Aamir Khollam, Interesting Engineering, 16 Dec. 2025 See All Example Sentences for seawater

Word History

First Known Use

before the 12th century, in the meaning defined above

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

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Cite this Entry

“Seawater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seawater. Accessed 6 Jan. 2026.

Kids Definition

seawater

noun
sea·​wa·​ter ˈsē-ˌwȯt-ər How to pronounce seawater (audio)
-ˌwät-
: water in or from the sea

More from Merriam-Webster on seawater

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