noun

citadel

citadel, fortress, stronghold

The ancient citadel overlooked the city.

The ancient citadel overlooked the city.

The university is a citadel of learning.

The university is a citadel of learning.

((a/the)) citadel a fortress protecting a town The ancient citadel overlooked the city.

((a)) citadel ((of sth.)) a place where a principle is strongly defended The university is a citadel of learning.

Synonyms: fortress, stronghold, bastion, castle

From Italian 'cittadella', diminutive of 'città' (city), meaning 'little city'. It was a fortress protecting a town.

Think of it as 'city-dell', a 'little city' built for the defence of a larger one.

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