inner sanctum

noun

somewhat formal

: a very private room or place

The new initiate was admitted to the club's inner sanctum.

—often used figuratively

the inner sanctum of the CIA

Examples of inner sanctum in a Sentence

Recent Examples on the Web

The character is introduced leaving the heavily secure FBI repository of child pornography — the gloomy inner sanctum of the gloomy basement. — Daniel Fienberg, HollywoodReporter, 22 July 2026

Trying to pry out more details about Deerhead's secret sauce is like trying to gain security clearance to the CIA's inner sanctum. — Usa Today Network, USA Today, 15 July 2026

The former is heralded with a blast of horns; the latter guards its inner sanctum behind Tobie Windham’s officious sentry. — Amy Nicholson, Los Angeles Times, 8 July 2026

Numerous business keynote speakers are scheduled to speak in large group settings for lecture-style presentations and also small group inner sanctum sessions for more personable and in-depth conversations. — John Hall, Forbes.com, 7 June 2026