Source : Webster's Revised Unabridged Dictionary (1913)

Atticize \At"ti*cize\, v. t. [Gr. ?.]
   To conform or make conformable to the language, customs,
   etc., of Attica.

Atticize \At"ti*cize\, v. i.
   1. To side with the Athenians.

   2. To use the Attic idiom or style; to conform to the customs
      or modes of thought of the Athenians.