Source : Webster's Revised Unabridged Dictionary (1913)

Philanthropist \Phi*lan"thro*pist\, n. [Gr. ?; ? loving + ? man:
   cf. F. philanthrope.]
   One who practices philanthropy; one who loves mankind, and
   seeks to promote the good of others.

Source : WordNet®

philanthropist
     n : someone who makes charitable donations intended to increase
         human well-being [syn: {altruist}]