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

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

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