Sanctum sanctorum Meaning, Definition & Usage

  1. noun a place of inviolable privacy
    sanctum.
    • he withdrew to his sanctum sanctorum, where the children could never go
  2. noun (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.

WordNet

Definitions
  1. L. , the Holy of Holies; the most holy place, as in the Jewish temple.

Webster 1913