Sicyon (?s?s???n; ?s?s??n) n (Placename) an ancient city in S Greece, in the NE Peloponnese near Corinth: declined after 146 bcCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Si?cy?on (?s?? i??n, ?s?s-) n. an ancient city in S Greece, near Corinth. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.