a political state, in the widest sense, which is ruled as or like a principality in the generic sense, regardless of the ruler's actual title and rank.

An unusual ruler's title, sometimes incorrectly rendered as grand duke, mainly used in Lithuania and some parts of Russia (Muscovy would ultimately unite most Russian principalities and rise to imperial rank) and the Holy Roman Empire.

A prince who rules a country as a regent in place of a monarch who is unfit to rule for whatever reason.

plural of merchant prince

(historical or figuratively) A mercantile plutocrat: a man who wields great de facto political power by virtue of economic assets derived from trade and commerce.

plural of pearly prince

The son of a pearly family from East London.

A royal title given to the male heir apparent to the reigning monarch of the United Kingdom.

(postpositive) the husband of a queen regnant who is not himself a king in his own right.

Prince Rupert's metal