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end·pa·peralso end paper (ĕnd′pā′pər)
Either of two folded sheets of heavy paper having one half pasted to the inside front or back cover of a book and the other half pasted to the base of the first or last page. Also called end leaf.
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.
(Printing, Lithography & Bookbinding) either of two leaves at the front and back of a book pasted to the inside of the board covers and the first leaf of the book to secure the binding
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
or end′ pa`per,
a sheet of paper folded vertically once to form two leaves, one of which is pasted flat to the inside of the front or back cover of a book, with the other pasted to the inside edge of the first or last page to form a flyleaf. Also called end′ sheet`.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.