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.
The research, published in Nature Geoscience, showed that polymetallic nodules can act like natural batteries, splitting seawater into oxygen and hydrogen. Georgina Jedikovska, Interesting Engineering, 20 Jan. 2026 That material will then be suctioned up along with seawater and loaded onto large barges, known as scows, which carry a slurry of sediment, rocks and debris. Teresa Tomassoni, Sun Sentinel, 18 Jan. 2026 In a state bounded on three sides by seawater, where water courses through underground aquifers and some 50 inches of rain falls annually, a series of historic efforts to drain the Everglades have made modern Florida possible. Amy Green, Miami Herald, 9 Jan. 2026 The cycle swings between warmer and cooler seawater in a region along the equator in the tropical Pacific. Doyle Rice, USA Today, 8 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

Browse Nearby Words

Cite this Entry

“Seawater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seawater. Accessed 25 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

Last Updated: - Updated example sentences
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