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
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The cycle swings between warmer and cooler seawater in a region along the equator in the tropical Pacific. Doyle Rice, USA Today, 17 Mar. 2026 Zero degrees Fahrenheit — which is cold enough to warrant official warnings, yet traditionally in Chicago, not cold enough to close schools — is popularly thought to be the temperature at which seawater freezes. Adam Harrington, CBS News, 17 Mar. 2026 In a new study, Daniel Petras, a biochemist at UC Riverside — together with 29 researchers from around the world — looked at 2,315 seawater samples collected from estuaries, coastal regions, coral reefs and the open ocean. Susanne Rust follow, Los Angeles Times, 16 Mar. 2026 The wind turbine mounted atop generates electricity that powers the computing systems below, while the surrounding seawater cools them. Etiido Uko march 13, New Atlas, 13 Mar. 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

Browse Nearby Words

Cite this Entry

“Seawater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seawater. Accessed 21 Mar. 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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