Irish Sea

American

noun

a part of the Atlantic Ocean between Ireland and England.

Irish Sea British

noun

an arm of the North Atlantic Ocean between Great Britain and Ireland

"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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Irish Sea

It features sheer cliffs that drop dramatically straight into the Irish Sea.

From BBC ● Jul. 15, 2026

St. Patrick offered evocative details of slaving and missionary work in the lands around the Irish Sea.

From The Wall Street Journal ● Jul. 7, 2026

Stretching east to west from the North Sea to the Irish Sea, Hadrian's Wall featured a series of forts and towers placed at regular intervals.

From Science Daily ● Dec. 21, 2025

There is also the threat of gales around Irish Sea coasts.

From BBC ● Sep. 18, 2025

The Irish Sea is desperate at this time of the year.

From "Angela's Ashes: A Memoir" by Frank McCourt

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023