Noun: holy of holies
- (Judaism) sanctuary comprised of the innermost chamber of the Tabernacle in the temple of Solomon where the Ark of the Covenant was kept
"Only the high priest could enter the holy of holies on Yom Kippur";
- sanctum sanctorum
- (figurative) something regarded as sacred or inviolable
"every politician fears to touch that holy of holies, the Social Security System"
Type of: sacredness, sanctuary
Part of: Tabernacle
Encyclopedia: Holy of holies