Snow·don (sn?d?n) A massif of northwest Wales. Rising to 1,085 m (3,560 ft), it is the highest elevation in Wales.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.Snowdon (?sn??d?n) n (Placename) a mountain in NW Wales, in Gwynedd: the highest peak in Wales. Height: 1085 m (3560 ft). Welsh name: Yr Wyddfa Snowdon (?sn??d?n) n (Biography) 1st Earl of, title of Antony Armstrong-Jones. born 1930, British photographer, whose work includes television documentaries, photographic books, and the design of the Snowdon Aviary, London Zoo (1965). His marriage (1960?78) to Princess Margaret ended in divorceCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Snow?don (?sno?d n) n. a mountain in NW Wales: highest peak in Wales. 3560 ft. (1085 m). Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.