a German nobleman ranking above a count. Margraves were originally counts appointed to govern frontier provinces, but all had become princes of the Holy Roman Empire by the 12th century
[C16: from Middle Dutch markgrave, literally: count of the march²]
military governor of a Ger. border province, 1551, from M.Du. markgrave, from O.H.G. marcgravo; second element from graf "count, earl" (O.H.G. gravo, gravjo; for first element see mark (1)).