The definition of a sacrarium is a drain that empties directly into soil and is used for disposing of water used to wash sacred items.
An example of a sacrarium is the drain in the basin where the communion chalices and trays are washed.
The sanctuary or sacristy of a church.
A drain, usually in a sacristy, leading directly to the earth, for disposal of water used in washing altar linens, chalices, etc.
Origin of sacrarium
Medieval Latin sacrārium from Latin shrine from sacer sacr- sacred sacred