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Synonyms

Inland Sea

American  

noun

  1. a sea in SW Japan, enclosed by the islands of Honshu, Shikoku, and Kyushu. 240 miles (385 km) long.


Inland Sea British  

noun

  1. Japanese name: Seto Naikai.  a sea in SW Japan, between the islands of Honshu, Shikoku, and Kyushu

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Moscow and Tehran have used the world’s largest inland sea to move everything from drones to oil and wheat.

From The Wall Street Journal • Mar. 26, 2026

Over time, increasing amounts of freshwater flowed into the Western Interior Seaway, a vast inland sea that once ran north to south across what is now central North America and split the continent in two.

From Science Daily • Dec. 15, 2025

During the late Cretaceous, the continent was split in half by an inland sea.

From New York Times • Jun. 20, 2024

They take the total number of monotreme species known to have once lived at Lightning Ridge - which was in ancient times a cold, wet forest bordering a vast inland sea - to six.

From BBC • May 27, 2024

Before the inland sea the valley must have been a forest.

From "East of Eden" by John Steinbeck

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