grand·par·ent (gr?nd?pâr??nt, -p?r?-, gr?n?-)n. A parent of one’s mother or father; a grandmother or grandfather.grand?pa·ren?tal (-p?-r?n?tl) adj.grand?par?ent·hood? n.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.grandparent (??ræn?p??r?nt; ??rænd-) nthe father or mother of either of one’s parentsCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014grand?par?ent (?græn?p??r ?nt, -?pær-, ?grænd-) n. a parent of a parent; a grandmother or grandfather. [1820?30] grand?par`ent?ing, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.