- The definition of a magnate is someone who is influential and powerful in a specific field.
William Randolph Hearst is an example of a newspaper magnate.
Origin: Middle English from Late Latin magnas (pl. magnates), great man from Classical Latin magnus, great: see magni-
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Origin: From Middle English magnates, magnates, from Late Latin magnātēs, pl. of magnās, magnate, from Latin magnus, great; see meg- in Indo-European roots.