sea·​way | \ ˈsē-ˌwā How to pronounce seaway (audio) \

Definition of seaway

1 : the sea as a route for travel also : an ocean traffic lane
2 : a moderate or rough sea
3 : a deep inland waterway that admits ocean shipping

Examples of seaway in a Sentence

Recent Examples on the Web Back then, eastern New Mexico was covered by a seaway that extended deep into North America., 17 Apr. 2021 The Great Lakes region is recognized for its seaway and international borders. Nour Rahal, Detroit Free Press, 15 Mar. 2021 But, like the Balize concept, the idea of a manmade seaway and inland harbor would persist. Richard Campanella,, 1 Jan. 2021 Nature got its revenge during Barents’s third attempt to find a seaway to China, the ice finally won. New York Times, 8 Jan. 2021 With the lower Mississippi now passable, the seaway proposals died out, sparing New Orleans what probably would have been an environmental and economic disaster. Richard Campanella,, 1 Jan. 2021 The mostly frozen seaway is used in warmer seasons to move some of Russia’s energy exports to overseas markets. Costas Paris, WSJ, 8 Oct. 2020 The dinosaur fossilized under remarkable circumstances: Somehow, the animal ended up dead in a river and was swept more than 100 miles into a seaway that once split North America in two, from the Gulf of Mexico to the Arctic Ocean. Michael Greshko, National Geographic, 2 June 2020 The Australian sunshine seaway is a little bit different, as one trunk connecting two far-apart land masses: Australia’s sparsely inhabited Northern Territory and the dense, import-only energy grid of island Singapore. Caroline Delbert, Popular Mechanics, 28 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seaway.' 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 seaway

before the 12th century, in the meaning defined at sense 1

Keep scrolling for more

Learn More About seaway

Time Traveler for seaway

Time Traveler

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

See more words from the same century

Dictionary Entries Near seaway

sea wax



See More Nearby Entries 

Statistics for seaway

Cite this Entry

“Seaway.” Dictionary, Merriam-Webster, Accessed 22 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about

More from Merriam-Webster on seaway

Britannica English: Translation of seaway for Arabic Speakers


Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Love words? Need even more definitions?

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