What is the meaning of Ciborium?

A fixed vaulted canopy over a Christian altar, supported on four columns.

A covered receptacle for holding the consecrated wafers of the Eucharist.

ciborium

the seedvessel of sacred lotus which served as a drinking vessel with the Egyptians

by extension, any drinking vessel approximating the shape of the seedcase of the sacred lotus

a vaulted canopy over a Christian altar fixed on four columns

Source: wiktionary.org