- Geology. a large mass of rock thrust a considerable distance along a nearly horizontal fault plane or in an overturned anticlinal fold.
- Geometry. one of the two equal sections of a cone.
Origin of nappe
1905–10, Americanism; < French: literally, tablecloth, cloth; Old French nappe, nape < Latin mappa; cf. napkin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a large sheet or mass of rock, commonly a recumbent fold, that has been thrust from its original position by earth movements
- the sheet of water that flows over a dam or weir
- geometry either of the two parts into which a cone (sense 2) is divided by the vertex
C20: from French: tablecloth