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

The effects of Hurricane Erin sent seawater spilling over dunes and onto parts of North Carolina’s Outer Banks Wednesday, swamping a highway on Hatteras Island where residents had been ordered to leave. —Rebecca Cohen, NBC news, 20 Aug. 2025

Authorities want people to leave before seawater overtakes Highway 12, the main road connecting a long string of North Carolina communities. —Bill Chappell, NPR, 19 Aug. 2025

Sardinia’s connection to the healing power of seawater dates back to the island’s Nuragic civilization of 1800 BC, which practiced water rituals aligned with lunar and astronomical cycles. —Alexandra Kirkman, Forbes.com, 15 Aug. 2025

The blood-testing organs don’t measure water levels but rather the concentration of salt, whose healthy range lies at almost exactly the same concentration as that of the brackish intertidal water in which vertebrates first evolved (which is about one-third as salty as seawater). —Dan Samorodnitsky, Quanta Magazine, 11 Aug. 2025

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