finisher

from The Century Dictionary.

• noun One who or that which finishes, completes, or perfects.
• noun Specifically— In bookbinding, a workman who takes the incomplete book as left by the forwarder and finishes the work with gilding and decoration by various methods.
• noun In stereotyping and electrotyping, a workman who perfects the face of plates by cutting out superfluous metal, rectifying faults, and correcting errors, for which purpose he cuts out the letters or words to be changed and solders in separate types or cast pieces.
• noun In paper-making, the second rag-pulping machine or half-stuff engine.
• noun In the manufacture of fabrics, the final carder, or the one that delivers the sliver. See carding-machine.
• noun In pianoforte-making, the workman who puts the action together and fastens it into the case.
• noun One who or that which puts an end to something; in colloquial use, that which settles or puts the finishing touch to something.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.
• noun colloq. Something that gives the finishing touch to, or settles, anything.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A person who finishes or completes something
• noun A construction machine used to smooth a newly constructed road surface
• noun video games, informal A finishing move.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a racing driver who finishes a race
• noun a worker who performs the last step in a manufacturing process
• noun a race car that finishes a race
• noun an animal that wins in a contest of speed
• noun (baseball) a relief pitcher who can protect a lead in the last inning or two of the game
• noun a painter who applies a finishing coat