Citadel – A fortress (typically one on high ground above a city)

(Pronounced sit-uh-del)

To remember the definition of the word citadel, use the following mnemonic:

She would sit and yodel (citadel) from the walls of the fortress high above the city.

Examples of citadel in a sentence

During the invasion, the guards hid the king and his family in the citadel above the city.

It was a fantastic citadel of light and colour, planned by the ruler to be the jewel in the crown of his kingdom.

The traitors were held in the city's citadel on the hill before their execution the following day.