- 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.
magnate definition by Webster's New World
Origin: Middle English ; from Late Latin magnas (pl. magnates), great man ; from Classical Latin magnus, great: see magni-
magnate definition by American Heritage Dictionary
Origin: From Middle English magnates, magnates, from Late Latin magnātēs, pl. of magnās, magnate, from Latin magnus, great; see meg- in Indo-European roots.