zo·na·tion (z?-n??sh?n)n.1. Arrangement or formation in zones; zonate structure.2. Ecology The distribution of organisms in biogeographic zones.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.zonation (z???ne???n) narrangement in zones; zonate formationCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014zo?na?tion (zo??ne? ??n) n. 1. the state or condition of being zonate. 2. arrangement or distribution in zones. [1900?05] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.