- a state ruled by a prince.；Wales.
noun: principality, plural noun: principalities
- 1. a state ruled by a prince.
- ▪ British Wales.
- 2. (in traditional Christian angelology) the fifth highest order of the ninefold celestial hierarchy.
- the former European principalities of Moldavia and Wallachia. In 1861 they united to form the ...
- a state ruled by a prince.