Source : Webster's Revised Unabridged Dictionary (1913)

Ton \Ton\, n. [F. See {Tone}.]
   The prevailing fashion or mode; vogue; as, things of ton.
   --Byron.

         If our people of ton are selfish, at any rate they show
         they are selfish.                        --Thackeray.

   {Bon ton}. See in the Vocabulary.

Bon ton \Bon" ton"\ [F., good tone, manner.]
   The height of the fashion; fashionable society.

Source : WordNet®

bon ton
     n : the fashionable elite [syn: {society}, {high society}, {beau
         monde}, {smart set}]