Source : Webster's Revised Unabridged Dictionary (1913)

Budget \Budg"et\, n. [OE. bogett, bouget, F. bougette bag,
   wallet, dim. of OF. boge, bouge, leather bag. See {Budge},
   n., and cf. {Bouget}.]
   1. A bag or sack with its contents; hence, a stock or store;
      an accumulation; as, a budget of inventions.

   2. The annual financial statement which the British
      chancellor of the exchequer makes in the House of Commons.
      It comprehends a general view of the finances of the
      country, with the proposed plan of taxation for the
      ensuing year. The term is sometimes applied to a similar
      statement in other countries.

   {To open the budget}, to lay before a legislative body the
      financial estimates and plans of the executive government.

Source : WordNet®

budget
     n 1: a sum of money allocated for a particular purpose; "the
          laboratory runs on a budget of a million a year"
     2: a summary of intended expenditures along with proposals for
        how to meet them; "the president submitted the annual
        budget to Congress"
     v : make a budget