Source : Webster's Revised Unabridged Dictionary (1913)

Hellenism \Hel"len*ism\, n. [Gr. ?: cf. F. Hell['e]nisme.]
   1. A phrase or form of speech in accordance with genius and
      construction or idioms of the Greek language; a Grecism.
      --Addison.

   2. The type of character of the ancient Greeks, who aimed at
      culture, grace, and amenity, as the chief elements in
      human well-being and perfection.

Source : WordNet®

Hellenism
     n : the principles and ideals associated with classical Greek
         civilization