Atlantis

[ at-lan-tis ]
/ ætˈlæn tɪs /

noun

a legendary island, first mentioned by Plato, said to have existed in the Atlantic Ocean west of Gibraltar and to have sunk beneath the sea, but linked by some modern archaeologists with the island of Thera, the surviving remnant of a much larger island destroyed by a volcanic eruption c1500 b.c.
Compare Akrotíri.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for atlantis

Atlantis
/ (ətˈlæntɪs) /

noun

(in ancient legend) a continent said to have sunk beneath the Atlantic Ocean west of the Straits of Gibraltar
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

Cultural definitions for atlantis

Atlantis

A kingdom in classical mythology. According to legend, it was once an island in the Atlantic Ocean, was swallowed up in an earthquake, and is now covered by the sea.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.