What is the meaning of Margrave?

A feudal era military-administrative officer of comital rank in the Carolingian empire and some successor states, originally in charge of a border area.

A hereditary ruling prince in certain feudal states of the Holy Roman Empire and elsewhere; the titular equivalent became known as marquis or marquess.

a margrave

margravine

margrave (military officer in charge of German border area)

margrave (military-administrative officer)

Source: wiktionary.org