Il·lam·pu (?-yäm?po?o) A peak, 6,368 m (20,892 ft) high, in the Andes of western Bolivia northwest of La Paz.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.Illampu (Spanish i?am?pu) n (Placename) one of the two peaks of Mount SorataCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014I?llam?pu (i?y?m pu) n. a peak of Mount Sorata, in W Bolivia. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.