citadel Meaning, Definition & Usage

  1. noun a stronghold into which people could go for shelter during a battle
    bastion.

WordNet

Cit"a*del noun
Etymology
F. citadelle, It. citadella, di. of citt city, fr. L. civitas. See City.
Definitions
  1. A fortress in or near a fortified city, commanding the city and fortifications, and intended as a final point of defense.

Webster 1913