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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To learn more, the researchers relied on a unique dataset created by analyzing seawater samples that have been collected twice weekly from La Jolla’s Scripps Pier since 2018. Noah Lyons, San Diego Union-Tribune, 27 Jan. 2026 It’s found naturally in seawater and isn’t as corrosive as other de-icers. Karen Brewer Grossman, Southern Living, 23 Jan. 2026 Fascinatingly, this strategy is strikingly similar to those of sharks and rays, which also retain their urea to account for the salinity of seawater. Scott Travers, Forbes.com, 22 Jan. 2026 Unlike conventional batteries, SZABs use seawater as the electrolyte due to its high ionic conductivity, thereby avoiding the need for freshwater resources and enabling cost-effective, scalable applications in marine environments, according to the study. Prabhat Ranjan Mishra, Interesting Engineering, 21 Jan. 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

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Cite this Entry

“Seawater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seawater. Accessed 1 Feb. 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

Last Updated: - Updated example sentences
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