seawater

noun

sea·​wa·​ter ˈsē-ˌwȯ-tər 

-ˌwä-

: water in or from the sea

Examples of seawater in a Sentence

Recent Examples on the Web

Part of the research assignment was to figure out how to more efficiently extract carbon from deep seawater and add it to the shallow water near the coral to simulate rising ocean acidity. — Hilary Whiteman, CNN Money, 6 Nov. 2026

The intense erosion that carved the Great Unconformity washed rock material into the oceans, possibly fertilizing them just before the Cambrian explosion, when calcium became abundant in seawater. — Jacek Krywko, ArsTechnica, 6 Nov. 2026

That's a key market for DuPont's desalination technology, which makes seawater safe to drink. — Kevin Stankiewicz, CNBC, 3 Nov. 2026

The most recent first Kelvin wave arrived around the same time that swells from former Hurricane Rachel hit in early October, and sent seawater crashing into homes on the Long Beach Peninsula and covered Newport Beach’s Balboa Peninsula with water. — Sean Greene, Los Angeles Times, 2 Nov. 2026

Word History

First Known Use

before the 12th century, in the meaning defined above

Rhymes for seawater

• backwater
• bathwater
• blackwater
• breakwater
• deepwater
• edgewater
• feedwater
• floodwater
• freshwater
• granddaughter
• groundwater
• headwater

Kids Definition

seawater

noun

sea·​wa·​ter ˈsē-ˌwȯt-ər 

-ˌwät-

: water in or from the sea