Definition from Wiktionary, the free dictionary
cornice (plural cornices)
- (architecture) A horizontal architectural element of a building, projecting forward from the main walls, originally used as a means of directing rainwater away from the building's walls. See also: eaves, fascia.
- A decorative element applied at the topmost part of the wall of a room, as with a crown moulding.
- A decorative element at the topmost portion of certain pieces of furniture, as with a highboy.
the topmost architectural element of a building used as a means of directing rainwater away from the building's walls
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Translations to be checked
cornice f (plural cornici)
Derived terms 
- ablative singular of cornix