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.
However, perovskites are notoriously vulnerable to moisture and harsh chemical environments, posing a clear problem in seawater. — New Atlas, 24 Oct. 2026 An additional concern is the fact that tens of millions of Gulf residents rely on desalination plants, which convert seawater into drinking water. — Paula Hancocks, CNN Money, 23 Oct. 2026 It’s cooled with seawater from the Gulf of Finland instead of conventional water cooling. — Joshua Hong, Fortune, 23 Oct. 2026 For every liter of freshwater produced, a typical seawater desalination plant sends about a liter and a half of salty brine back to the sea. — Muskan Bhatia, Interesting Engineering, 23 Oct. 2026 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

Rhymes for seawater

See All Rhymes for seawater

Browse Nearby Words

sea watch
seawater
sea-water green
See all Nearby Words

Cite this Entry

“Seawater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seawater. Accessed 28 Oct. 2026.

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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

Britannica.com: Encyclopedia article about seawater

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