The Collaborative International Dictionary of English v.0.48:

Cutter \Cut"ter\ (k[u^]t"t[~e]r), n.
   1. One who cuts; as, a stone cutter; a die cutter; esp., one
      who cuts out garments.
      [1913 Webster]

   2. That which cuts; a machine or part of a machine, or a tool
      or instrument used for cutting, as that part of a mower
      which severs the stalk, or as a paper cutter.
      [1913 Webster]

   3. A fore tooth; an incisor. --Ray.
      [1913 Webster]

   4. (Naut.)
      (a) A boat used by ships of war.
      (b) A fast sailing vessel with one mast, rigged in most
          essentials like a sloop. A cutter is narrower and
          deeper than a sloop of the same length, and depends
          for stability on a deep keel, often heavily weighted
          with lead.
      (c) In the United States, a sailing vessel with one mast
          and a bowsprit, setting one or two headsails. In Great
          Britain and Europe, a cutter sets two headsails, with
          or without a bowsprit.
      (d) A small armed vessel, usually a steamer, in the
          revenue marine service; -- also called revenue
          cutter.
          [1913 Webster +RDH]

   5. A small, light one-horse sleigh.
      [1913 Webster]

   6. An officer in the exchequer who notes by cutting on the
      tallies the sums paid.
      [1913 Webster]

   7. A ruffian; a bravo; a destroyer. [Obs.]
      [1913 Webster]

   8. A kind of soft yellow brick, used for facework; -- so
      called from the facility with which it can be cut.
      [1913 Webster]

   Cutter bar. (Mach.)
      (a) A bar which carries a cutter or cutting tool, as in a
          boring machine.
      (b) The bar to which the triangular knives of a harvester
          are attached.

   Cutter head (Mach.), a rotating head, which itself forms a
      cutter, or a rotating stock to which cutters may be
      attached, as in a planing or matching machine. --Knight.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cutter
    n 1: someone who cuts or carves stone [syn: stonecutter,
         cutter]
    2: someone who carves the meat [syn: cutter, carver]
    3: someone whose work is cutting (as e.g. cutting cloth for
       garments)
    4: a boat for communication between ship and shore [syn:
       tender, ship's boat, pinnace, cutter]
    5: a sailing vessel with a single mast set further back than the
       mast of a sloop
    6: a cutting implement; a tool for cutting [syn: cutter,
       cutlery, cutting tool]