Source : Webster's Revised Unabridged Dictionary (1913)

Finisher \Fin"ish*er\, n.
   1. One who finishes, puts an end to, completes, or perfects;
      esp. used in the trades, as in hatting, weaving, etc., for
      the workman who gives a finishing touch to the work, or
      any part of it, and brings it to perfection.

            O prophet of glad tidings, finisher Of utmost hope!
                                                  --Milton.

   2. Something that gives the finishing touch to, or settles,
      anything. [Colloq.]

Source : WordNet®

finisher
     n 1: (baseball) a relief pitcher who can protect a lead in the
          last inning or two of the game [syn: {closer}]
     2: a painter who applies a finishing coat
     3: a worker who performs the last step in a manufacturing
        process