Definition

Noun: 1. A fortress, typically on high ground, protecting or dominating a city: A citadel is a strong, fortified structure, often the core defensive position within a city or town, designed to be a final place of refuge during an attack. 2. A secure refuge or stronghold: By extension, a citadel can refer to any place or thing that serves as a central, secure, and protected stronghold.

Usage

The word "citadel" is used to describe a central defensive fortress. It often implies the last line of defense or a place of ultimate security within a larger area.

Examples

• The ancient citadel overlooked the entire valley, giving its defenders a strategic advantage.
• During the invasion, the townspeople sought safety within the walls of the citadel.
• The laboratory was a citadel of scientific research, isolated from outside interference.

Advanced Usage

• Figurative Use: Commonly used metaphorically to describe an institution, idea, or group that is a stronghold of a particular principle or power.
  • The university was long considered a citadel of conservative thought.

Variants and Related Words

• Citadels (plural noun): The plural form.
  • Medieval cities often had impressive citadels.

Synonyms

• Fortress
• Stronghold
• Fortification
• Castle (in some contexts)
• Bastion

Idioms and Phrases

• The last citadel: A phrase emphasizing something as the final, most secure defense or refuge.
  • Freedom of speech is the last citadel of a democratic society.

Noun

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