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A region of southeast Scotland on the Firth of Forth surrounding Edinburgh. "The Heart of Midlothian" was a popular name for the former Tolbooth Prison in Edinburgh and was used by Sir Walter Scott as the title of his 1818 novel.
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.
(Placename) a council area of SE central Scotland: the historical county of Midlothian (including Edinburgh) became part of Lothian region in 1975; separate unitary authorities were created for Midlothian and City of Edinburgh in 1996; mainly agricultural. Administrative centre: Dalkeith. Pop: 79 710 (2003 est). Area: 356 sq km (137 sq miles)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Mid•lo•thi•an(mɪdˈloʊ ði ən)
a historic county in SE Scotland.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.