Definition of baldacchin:
(n) :
(countable) A canopy suspended over an altar or throne, originally made of this fabric; a ciborium.
(n) :
(countable) A building in the form of a canopy, or a crown supported by pillars for the covering of an altar; a canopy carried over the host in Roman Catholic countries.
(n) :
(uncountable, archaic) A rich, embroidered brocade used for clothing in the Middle Ages, the web being gold and the woof silk.