citadel
gb/sˈɪtədˌɛl/ us/sˈɪtədˌɛl/
C1
English
~ 8200
Senses
0 senses
Noun
C1
entity
1
strong fortress defending a city
A very strong castle or fort, usually on a hill, that protects a city nearby.
Usage pattern:
a citadel protects [a town/city]
Common mistake:
Learners sometimes confuse "citadel" with "cathedral" because they look similar in writing. A citadel is a military fortress, while a cathedral is a large, important church. Learners may also use "citadel" for any castle; in everyday English, "castle" or "fortress" is usually more natural unless you specifically mean a defensive structure linked to a city.
Synonyms
fortress (More common and general; can refer to any strong fort, not just one linked to a city.)
|
stronghold (Stresses strong defense; can also be used more broadly and figuratively.)
|
castle (Often suggests a large stone home for royalty or nobility, not always a purely military structure.)
Antonyms
open town (A settlement without strong defensive walls or fortifications.)
Collocations
ancient citadel
|hilltop citadel
|walled citadel
|storm the citadel
|defend the citadel
|city citadel
Themes
history
|military
|geography
|travel
|law
|core_vocabulary
Examples
- The old citadel overlooks the harbor and once guarded every ship that entered the bay.
- Soldiers lined the walls of the citadel as the enemy army advanced across the plain.
- Tourists now walk through the ruins of the hilltop citadel, imagining how it looked in ancient times.
- The king ordered the villagers to take shelter inside the citadel during the invasion.
- From the citadel, you can see the entire city spread out below.
Learner examples
- The city was safe inside the high citadel.
- We climbed up to the citadel to see the old stone walls.
- Long ago, people ran to the citadel when there was a war.
- The citadel stands on a rock above the town.
- Soldiers guarded the gates of the citadel.
Noun
formal
C1
entity
2
stronghold of an idea or group
A place or group that very strongly supports or protects a certain idea, activity, or type of people.
Usage pattern:
a citadel of [idea/activity/group]
Common mistake:
Learners may think this figurative use means a real building. When you say "citadel of democracy" or "citadel of learning," you usually mean an important place or institution that strongly protects or represents that idea, not a physical fortress. Learners also sometimes use "citadel" alone where "center" or "hub" would sound more natural; in modern English, it is most often used in the pattern "citadel of X."
Synonyms
stronghold (Very close figurative meaning; slightly more common in everyday use for centers of support.)
|
bastion (Common in similar figurative contexts; often sounds formal or journalistic, with a defensive feel.)
|
hub (Focuses more on being a center of activity than on protection or defense.)
Antonyms
weakhold (Rarely used in practice but conceptually opposite as a place where support is weak.)
|
backwater (A place seen as unimportant and not active; opposite of a powerful center of influence.)
Collocations
citadel of learning
|citadel of democracy
|citadel of power
|citadel of freedom
|citadel of tradition
|citadel of industry
Themes
society
|politics
|education
|relationships
|core_vocabulary
Examples
- For decades, the university has been described as a citadel of learning and innovation.
- Many see the Supreme Court as a final citadel of justice in the country.
- The party once considered the region a citadel of support, but recent elections have challenged that view.
- The newspaper was long regarded as a citadel of independent journalism.
- These reforms are shaking the old citadels of power in the banking industry.
Learner examples
- That school is a citadel of science and research.
- The city became a citadel of jazz music in the 1950s.
- The group wants to break the old citadels of power in the country.
- This court is the citadel of our rights and freedoms.
- The museum is a citadel of modern art.
Grammar
Dictionary form
citadel
IPA
GB/sˈɪtədˌɛl/
US/sˈɪtədˌɛl/
Syllables & stress
cit - adel (2 syllables)
Stress on 1st syllable (cit)
Word forms
Noun
- Base: citadel
- Plural: citadels
Word family
Expressions
citadel of democracy
1/sˈɪtədˌɛl əv dɪmˈɑkɹəsi/
fixed phrase
formal
strong protector of democracy
A place or institution that strongly protects and represents democratic ideas and rules.
Examples
- The parliament is often called the citadel of democracy in the country.
- They argued that attacking the free press is like attacking a citadel of democracy.
citadel of learning
1/sˈɪtədˌɛl əv lˈɚnɪŋ/
fixed phrase
formal
highly respected educational institution
A school or university that is very well known and respected for education and study.
Examples
- The university likes to present itself as a citadel of learning open to students from all backgrounds.
- For more than a century, this small college has been a citadel of learning in the region.
citadel of power
1/sˈɪtədˌɛl əv pˈaʊɚ/
fixed phrase
formal
center of concentrated power
A place or group where a lot of political or economic power is held and protected.
Examples
- The report exposed corruption at the very heart of the citadel of power.
- Protesters marched toward the capital, saying they wanted to be heard inside the citadels of power.