Definition of citadel:
bailey, center, casbah, castle, stronghold, chateau, fortress, bell tower, bastion, castellated, location, belfry, scene, locale, fort, chatelaine, battlements, base, fastness, venue, site, place, whereabouts, campanile, hold, fortification, redoubt, setting.
- "The Scottish Chiefs", Jane Porter.
- "The Anti-Slavery Examiner, Omnibus", American Anti-Slavery Society.
- "The Franco-German War of 1870-71", Count Helmuth, von Moltke.