WordWeb Online

1. A place of inviolable privacy
   "he withdrew to his sanctum sanctorum, where the children could never go";
   - sanctum
    
2. (Judaism) sanctuary comprised of the innermost chamber of the Tabernacle in the temple of Solomon where the Ark of the Covenant was kept
   - holy of holies

Derived forms: sanctum sanctorums

Type of: retreat, sanctuary

Part of: Tabernacle

Encyclopedia: Sanctum sanctorum