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

Barnacles, mussels, clams, algae and other warm-seawater-dwelling fauna and flora have latched onto oil tankers hundreds of massive oil tankers anchored in the Persian Gulf over the past several months. — David Goldman, CNN Money, 23 June 2026

Fresh water density is 1,000 kg/m3 (with only slight temperature changes), while seawater weighs 1,026 kg/ m3—but densities of aquatic organisms are higher and adaptations are needed to achieve buoyancy. — Literary Hub, 22 June 2026

The bones also were coated with a light layer of minerals from the surrounding seawater, which may have prevented them from degrading. — Adithi Ramakrishnan, Los Angeles Times, 14 June 2026

For the frosted flatwoods salamander, a threatened species, the change was more severe—seawater was pushed into their freshwater breeding habitats, imperiling their survival. — Jeff Vandermeer, Travel + Leisure, 11 June 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