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In Arthurian legend, an island paradise in the western seas to which King Arthur was taken after he was mortally wounded in battle.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(European Myth & Legend) Celtic myth an island paradise in the western seas: in Arthurian legend it is where King Arthur was taken after he was mortally wounded
[from Medieval Latin insula avallonis island of Avalon, from Old Welsh aballon apple]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or Av•al•lon(ˈæv əˌlɒn)
an island to which the mortally wounded King Arthur was carried after his last battle.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.