Territory ruled by a prince WordNet 3.0 & Open English WordNet

A principality can either be a monarchical feudatory or a sovereign state, ruled or reigned over by a regnant-monarch with the title of prince and/or princess, or by a monarch with another title considered to fall under the generic meaning of the term prince. Wikipedia

Monarchical feudatory or sovereign state, ruled or reigned over by a monarch with the title of prince or princess. Wikipedia Disambiguation

Monarchical feudatory or a sovereign state, ruled or reigned over by a monarch with the title of prince Wikidata

A region or sovereign nation headed by a prince or princess. Wiktionary

Region. Wiktionary (translation)