sea·​wa·​ter | \ ˈsē-ˌwȯ-tər How to pronounce seawater (audio) , -ˌwä-\

Definition of seawater

: water in or from the sea

Examples of seawater in a Sentence

Recent Examples on the Web

Authorities were also checking what happened to about 70 men who reportedly returned to their coastal village to check on their homes during dangerous storm surges that saw walls of seawater whipped inland. Aaron Favila And Joeal Calupitan, Fox News, "Philippines checking typhoon's damage, casualties amid rains," 15 Sep. 2018 Oysters should never have any odor other than just a slight whiff of seawater. Alex Hitz, House Beautiful, "Alex Hitz's Oyster Stew Recipe," 19 Dec. 2012 One of the big problems for us with everything is these artifacts have been soaking and marinating in the seawater for years and years and years. Kiona N. Smith, Ars Technica, "Tiny magnets will escort ions out of rare material from a shipwreck," 24 Aug. 2018 Authorities on Sunday warned the public to stay away from the toxic steam cloud, which is formed by a chemical reaction when lava touches seawater. CBS News, "Lava from Hawaii volcano oozes into ocean, creating new toxic hazard," 21 May 2018 The storm’s first effects were already apparent on barrier islands as dangerous rip currents hit beaches and seawater flowed over a state highway. Jonathan Drew, The Seattle Times, "Millions prepare for potentially catastrophic Florence," 10 Sep. 2018 Laze forms when lava reaching temperatures of around 2,100 degrees Fahrenheit strikes seawater. Rachel Becker, The Verge, "The lava striking the sea is gorgeous — and can be deadly," 22 May 2018 Researchers have looked to the skies, in seawater and in ice for them. Adam Hadhazy, Discover Magazine, "Scientists Hunt for A Seeming Paradox: A Magnet With Only One Pole," 13 Nov. 2018 Still, processing seawater requires a great deal of energy, so fresh water is a valuable commodity. Dave Taft, New York Times, "The Biggest Bully on the Beach," 24 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seawater.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of seawater

before the 12th century, in the meaning defined above

Keep scrolling for more

Learn More about seawater

Statistics for seawater

Last Updated

21 Mar 2019

Look-up Popularity

Time Traveler for seawater

The first known use of seawater was before the 12th century

See more words from the same century

Keep scrolling for more

More Definitions for seawater



English Language Learners Definition of seawater

: water in or from the sea


sea·​wa·​ter | \ ˈsē-ˌwȯ-tər How to pronounce seawater (audio) , -ˌwä-\

Kids Definition of seawater

: water in or from the sea

Keep scrolling for more

More from Merriam-Webster on seawater

Rhyming Dictionary: Words that rhyme with seawater

Spanish Central: Translation of seawater

Nglish: Translation of seawater for Spanish Speakers Encyclopedia article about seawater

Comments on seawater

What made you want to look up seawater? Please tell us where you read or heard it (including the quote, if possible).


to move or proceed with twists and turns

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!