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A nonelected delegate to a presidential nominating convention, usually an office-holder or influential party leader, who is not pledged to support any particular candidate.
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.
another name for an unpledged delegate
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or su•per-del•e•gate(ˈsu pərˌdɛl ɪ gɪt, -ˌgeɪt)
a party leader or elected public official chosen as an uncommitted delegate to a national political convention.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.