from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Ecclesiastical The sanctuary or sacristy of a church.
- n. Ecclesiastical Piscina.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A place where sacred objects were kept, either in a temple (the adytum) or in a house (holding the penates)
- n. The area surrounding the altar of a Christian church; the sanctuary or piscina. Sometimes specifically a drain directly to the earth, perhaps including reference to a basin, for washing vessels from consecration.
from the GNU version of the Collaborative International Dictionary of English
- n. A sort of family chapel in the houses of the Romans, devoted to a special divinity.
- n. The adytum of a temple.
- n. In a Christian church, the sanctuary.
from The Century Dictionary and Cyclopedia
- n. In Roman antiquity: Any sacred or consecrated retired place; any place where sacred objects were deposited, as that connected with the Capitoline temple where were kept the processional chariots; sometimes, a locality where a statue of an emperor was placed.
- n. A sort of family chapel in private houses, in which the images of the Penates were kept.
- n. That part of a church where the altar is situated; the sanctuary; the chancel.
- n. In ornithology, the complex sacrum of any bird, consisting of dorsolumbar or lumbosacral and of urosacral vertebræ, as well as of sacrals proper.
It is as low as washing your hands in the sacrarium.
But I looked forward to even the humblest act—sweeping the vestibule, or rinsing the vessels from the Eucharist in the sacrarium so that no drop of Precious Blood wound up in the Concord sewers.
When as poor Lazarus is Dei sacrarium, the temple of God, lives and dies in true devotion, hath no more attendants, but his own innocency, the heaven a tomb, desires to be dissolved, buried in his mother's lap, and hath a company of  Angels ready to convey his soul into Abraham's bosom, he leaves an everlasting and a sweet memory behind him.
Vos vero veluti in templum ac sacrarium quoddam vos duci putetis, &c. Suavis et utilis cognitio.
When he wrote, the proposal was to replace Walsingham's stalls in the octagon, and to make Bishop Hotham's three Decorated bays into a sacrarium, and so presumably re-erect the high altar on the very spot where it stood in Norman times.
A stone screen now surrounds the sacrarium on three sides.
It spans the whole of the choir, and is continued along the sides of the sacrarium, forming sedilia of four seats on either side.
But if it can be done conveniently, the things in which they are found are to be burned, and the ashes put in the sacrarium, as was said of the scrapings of the altar-table, here above.
But if anything of the sort happen after the consecration, the insect should be caught carefully and washed thoroughly, then burned, and the "ablution," together with the ashes, thrown into the sacrarium.
Some persons go further, and cut out that part of the linen, which they burn, putting the ashes in the altar or down the sacrarium.