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

Researchers at Oak Ridge National Laboratory and Pacific Northwest National Laboratory developed and tested uranium-absorbing fibers in natural seawater, including experiments at Washington’s Sequim Bay. — Kaif Shaikh, Interesting Engineering, 5 Sep. 2026

Both Florida and Denmark are facing rising sea levels due a warmer global climate, which causes glaciers to melt and seawater to expand. — Zoey Thomas, Miami Herald, 5 Sep. 2026

After expansion, 5 °C (41 °F) deep seawater cools the ammonia in a condenser, and a pump returns the liquid ammonia. — New Atlas, 4 Sep. 2026

Five of the country’s six coastal desalination plants — which convert seawater into drinkable water — shut down on Sunday, according to Mekorot, Israel’s national water company. — Laura Paddison, CNN Money, 4 Sep. 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