[nap], (Noun)

Definitions:
- a sheet of rock that has moved sideways over neighbouring strata as a result of an overthrust or folding

- the desired consistency of a sauce, at which it is thick enough to coat the back of a spoon
(e.g: it is made from a roux and milk, gently simmered and stirred until thickened to a nappe)


Phrases:

Origin:
late 19th century: French