bōⁿtōⁿ, (ˈ)bänˈtän noun
( plural bon tons )
Etymology: French, literally, good tone
1. : stylishness , fashionableness
the worldliness and bon ton of the characters … held me spellbound — S.J.Perelman
2. : the fashionable or proper thing
the bon ton here is to be grave and learned — Horace Walpole
3. : a fashionable social set