Definition from Wiktionary, the free dictionary
sanctum (plural sanctums)
- A place set apart, as with a sanctum sanctorum; a sacred or private place; a private retreat or workroom.
2016 February 20, “Obituary: Antonin Scalia: Always right”, in The Economist:
- His colleagues quailed when, in 1986, he first sat on the court as a brash 50-year-old whose experience had been mostly as a combative government lawyer: a justice who, in that sanctum of columns and deep judicial silence, was suddenly firing questions like grapeshot.