Gran Chaco[grän c̸hä′kō̂]
Gran Chaco definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Gran Chaco definition by American Heritage Dictionary
A lowland plain of central South America divided among Paraguay, Bolivia, and Argentina. The arid plain is largely uninhabited.