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1. A sheet of water flowing over a dam or similar structure.
2. Geology A large sheetlike body of rock that has been moved far from its original position.
3. Mathematics Either of the two parts into which a cone is divided by the vertex.
[French, tablecloth, nappe, from Old French, tablecloth, from Latin mappa, napkin; see map.]
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.
1. (Geological Science) a large sheet or mass of rock, commonly a recumbent fold, that has been thrust from its original position by earth movements
2. the sheet of water that flows over a dam or weir
3. (Mathematics) geometry either of the two parts into which a cone (sense 2) is divided by the vertex
[C20: from French: tablecloth]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Geom. one of the two equal sections of a cone.
[1905–10; < French: literally, tablecloth; Old French nappe, nape < Latin mappa]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A recumbent (flopped over) fold that has sheared through, with its upper limb forced far forward.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited