Definition of lavatories:
(n) :
A vessel or fixture for washing, particularly:
(n) :
A laver: a washbasin.
(n) :
(Christianity) A piscina: the basin used for washing communion vessels.
(n) :
(Christianity) A lavabo: the basin used for washing one's hands before handling the Eucharist.
(n) :
(Christianity, usually figurative) A baptismal font: the basin used for baptism, used figuratively for the washing away of sins.
(n) :
(construction, interior design) A plumbing fixture used for washing: a sink.