a·crop·o·lis (?-kr?p??-l?s)n.1. The fortified height or citadel of an ancient Greek city.2. A raised area holding a building or cluster of buildings, especially in a pre-Columbian city.[Greek akropolis : akron, top; see acromegaly + polis, city; see pel?- in Indo-European roots.]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.acropolis (??kr?p?l?s) n (Architecture) the citadel of an ancient Greek city[C17: from Greek, from acro- + polis city]Acropolis (??kr?p?l?s) n (Named Buildings) the citadel of Athens on which the Parthenon and the Erechtheum standCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014a?crop?o?lis (??kr?p ? l?s) n. 1. the citadel or high fortified area of an ancient Greek city. 2. the Acropolis, the citadel of Athens and the site of the Parthenon. [1655?65;