Zwol·le (zwôl??, zvôl??) A city of central Netherlands on the Ijssel River. It is a transportation and industrial center.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.Zwolle (Dutch ?zw?l?) n (Placename) a town in the central Netherlands, capital of Overijssel province. Pop: 116 365 (2008)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Zwol?le (?zv?l ?) n. a city in the central Netherlands. 90,570. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.