Co·pán (k?-pän?) A ruined Mayan city of western Honduras that flourished from c. 300 bc to ad 900. The ruins include the Hieroglyphic Stairway with over 2,000 glyphs.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.Copán (Spanish ko?pan) n (Placename) a village in W Honduras: site of a ruined Mayan city.Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014