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 Portugal, the SIN01 AI data center in Sines uses seawater from the Atlantic to cool its servers before returning it to the ocean. — Nir Kshetri, The Conversation, 17 Aug. 2026 The kingdom is the largest single desalinator of seawater, producing 790 billion gallons per year, and relying on it for 60% of its potable needs. — Taylor Luck, Christian Science Monitor, 17 Aug. 2026 Researchers continue studying why certain Roman concrete structures have endured seawater and weathering so effectively. — Atharva Gosavi, Interesting Engineering, 16 Aug. 2026 El Niño, a natural warming of seawater in the Pacific Ocean, affects weather and climate patterns around the world. — Doyle Rice, USA Today, 13 Aug. 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 19 Aug. 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

Nglish: Translation of seawater for Spanish Speakers

Britannica.com: Encyclopedia article about seawater

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