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

Parkdale said Ciclo has been tested using ASTM and ISO methods in seawater, soil, wastewater sludge and biologically active landfill conditions. — Alexandra Harrell, Footwear News, 2 Oct. 2026

In Puerto San Carlos, a fishing town of about 5,700 people, some feared high tides and pounding waves from Polo could breach barriers and send seawater into the community. — Arkansas Online, 29 Sep. 2026

Ocean carries distant signals Hydrophones can detect sounds that travel considerable distances through seawater. — Aamir Khollam, Interesting Engineering, 29 Sep. 2026

Localized structure damage is possible, as is shallow seawater flooding over low-lying beach walkways, parking lots and roads, according to the weather service. — Alex Wigglesworth, Los Angeles Times, 28 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