Entry 1 sense Webster, 1913 Landgrave /lăn'-dgrāvˌ/ · Land·grave · IPA /lˈændɡrˌeɪv/ 01 n. A German nobleman of a rank corresponding to that of an earl in England and of a count in France. 1. A German nobleman of a rank corresponding to that of an earl in England and of a count in France.