Source : Webster's Revised Unabridged Dictionary (1913)

Vote \Vote\, n. [L. votum a vow, wish, will, fr. vovere, votum,
   to vow: cf. F. vote. See {Vow}.]
   1. An ardent wish or desire; a vow; a prayer. [Obs.]
      --Massinger.

   2. A wish, choice, or opinion, of a person or a body of
      persons, expressed in some received and authorized way;
      the expression of a wish, desire, will, preference, or
      choice, in regard to any measure proposed, in which the
      person voting has an interest in common with others,
      either in electing a person to office, or in passing laws,
      rules, regulations, etc.; suffrage.

   3. That by means of which will or preference is expressed in
      elections, or in deciding propositions; voice; a ballot; a
      ticket; as, a written vote.

            The freeman casting with unpurchased hand The vote
            that shakes the turrets of the land.  --Holmes.

   4. Expression of judgment or will by a majority; legal
      decision by some expression of the minds of a number; as,
      the vote was unanimous; a vote of confidence.

   5. Votes, collectively; as, the Tory vote; the labor vote.

   {Casting vote}, {Cumulative vote}, etc. See under {Casting},
      {Cumulative}, etc.

Casting \Cast"ing\, n.
   1. The act of one who casts or throws, as in fishing.

   2. The act or process of making casts or impressions, or of
      shaping metal or plaster in a mold; the act or the process
      of pouring molten metal into a mold.

   3. That which is cast in a mold; esp. the mass of metal so
      cast; as, a casting in iron; bronze casting.

   4. The warping of a board. --Brande & C.

   5. The act of casting off, or that which is cast off, as
      skin, feathers, excrement, etc.

   {Casting of draperies}, the proper distribution of the folds
      of garments, in painting and sculpture.

   {Casting line} (Fishing), the leader; also, sometimes applied
      to the long reel line.

   {Casting net}, a net which is cast and drawn, in distinction
      from a net that is set and left.

   {Casting voice}, {Casting vote}, the decisive vote of a
      presiding officer, when the votes of the assembly or house
      are equally divided. ``When there was an equal vote, the
      governor had the casting voice.'' --B. Trumbull.

Source : WordNet®

casting vote
     n : the deciding vote cast by the presiding officer to resolve a
         tie