Source : Webster's Revised Unabridged Dictionary (1913)

Sumptuary \Sump"tu*a*ry\, a. [L. sumptuarius, fr. sumptus
   expense, cost, fr. sumere, sumptum, to take, use, spend; sub
   under + emere to take, buy: cf. F. somptuaire. See {Redeem}.]
   Relating to expense; regulating expense or expenditure.
   --Bacon.

   {Sumptuary} {laws or regulations}, laws intended to restrain
      or limit the expenditure of citizens in apparel, food,
      furniture, etc.; laws which regulate the prices of
      commodities and the wages of labor; laws which forbid or
      restrict the use of certain articles, as of luxurious
      apparel.