RhymeZone: glacis definitions

Definitions of glacis:

noun: (military) A gentle incline in front of a fortification.
noun: (military) The angled armour plate on the front of a tank; glacis plate.
noun: (geomorphology) An erosional or depositional landform, with little slope.
noun: (postal service) A device for sorting mail which slides parcels across a sloped surface.
noun: An administrative district in Seychelles

(Definitions from Wiktionary)