Alexander the Great See Alexander III.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.Alexander the Great n (Biography) 356?323 bc, king of Macedon, who conquered Greece (336), Egypt (331), and the Persian Empire (328), and founded Alexandria Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Alexan?der the Great? n. 356?323 B.C., king of Macedonia 336?323: conqueror of Greek city-states and of the Persian Empire from Asia Minor and Egypt to India. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.