Meanings
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1
noun
a private room or retreat where someone can work or be undisturbed
Only close colleagues were invited into the editor's private sanctum.
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2
noun
a sacred place, especially the innermost part of a shrine or temple
Worshippers approached the sanctum in silence.
Thesaurus
Etymology
From Latin sanctum ("a holy place or thing"), the neuter of sanctus ("holy, consecrated"). The domestic sense developed by comparing a private room to an inviolable inner sanctuary.