Co·pen·ha·gen (k??p?n-h??g?n, -hä?-) The capital and largest city of Denmark, in the eastern part of the country on the eastern coast of Sjaelland. It was a trading and fishing center by the 11th century and became the capital in 1443.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.Copenhagen (?k??p?n?he???n; -?h??-; ?k??p?n?he?-; -?h??-) n (Placename) the capital of Denmark, a port on Zealand and the Amager Islands on a site inhabited for some 6000 years: exports chiefly agricultural products; iron and steel works; university (1479). Pop: 501 664 (2004 est). Danish name: København Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Co?pen?ha?gen (?ko? p?n?he? g?n, -?h?-, ?ko? p?n?he?-, -?h?-) n. the capital of Denmark on the E coast of Zealand. 802,391; with suburbs, 1,380,204. Danish, København. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.