Source : Webster's Revised Unabridged Dictionary (1913)

Purveyance \Pur*vey"ance\, n. [Cf. F. pourvoyance.]
   1. The act or process of providing or procuring; providence;
      foresight; preparation; management. --Chaucer.

            The ill purveyance of his page.       --Spenser.

   2. That which is provided; provisions; food.

   3. (Eng. Law) A providing necessaries for the sovereign by
      buying them at an appraised value in preference to all
      others, and oven without the owner's consent. This was
      formerly a royal prerogative, but has long been abolished.
      --Wharton.

Source : WordNet®

purveyance
     n : the act of supplying something