COLUMBARIUM
columbarium
(noun) a sepulchral vault or other structure having recesses in the walls to receive cinerary urns
columbarium, cinerarium
(noun) a niche for a funeral urn containing the ashes of the cremated dead
dovecote, columbarium, columbary
(noun) a birdhouse for pigeons
Source: WordNet® 3.1
Etymology
Noun
columbarium (plural columbariums or columbaria)
(historical) A large, sometimes architecturally impressive building for housing a large colony of pigeons or doves, particularly those of ancien regime France.
Synonym: dovecote
A pigeonhole in such a dovecote.
A building, a vault or a similar place for the respectful and usually public storage of cinerary urns containing cremated remains.
Synonym: cinerarium
A niche in such a building for housing urns.
Source: Wiktionary
Col`um*ba"ri*um, n.; pl. L. Columbaria Etym: [L. See Columbary.]
(Rom. Antiq.)
(a) A dovecote or pigeon house.
(b) A sepulchral chamber with niches for holding cinerary urns.
Source: Webster’s Unabridged Dictionary 1913 Edition