The Collaborative International Dictionary of English v.0.48:

Dock \Dock\ (d[o^]k), n. [AS. docce; of uncertain origin; cf. G.
   docken-bl[aum]tter, Gael. dogha burdock, OF. doque; perh.
   akin to L. daucus, daucum, Gr. ?, ?, a kind of parsnip or
   carrot, used in medicine. Cf. Burdock.] (Bot.)
   A genus of plants (Rumex), some species of which are
   well-known weeds which have a long taproot and are difficult
   of extermination.
   [1913 Webster]

   Note: Yellow dock is Rumex crispus, with smooth curly
         leaves and yellow root, which that of other species is
         used medicinally as an astringent and tonic.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dock \Dock\, v. t.
   To draw, law, or place (a ship) in a dock, for repairing,
   cleaning the bottom, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dock \Dock\, n. [Cf. Icel. dockr a short tail, Fries. dok a
   little bundle or bunch, G. docke bundle, skein, a short and
   thick column.]
   1. The solid part of an animal's tail, as distinguished from
      the hair; the stump of a tail; the part of a tail left
      after clipping or cutting. --Grew.
      [1913 Webster]

   2. A case of leather to cover the clipped or cut tail of a
      horse.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dock \Dock\, v. t. [imp. & p. p. Docked; p. pr. & vb. n.
   Docking.] [See Dock a tail. Cf. W. tociaw, and twciaw, to
   dock, clip.]
   1. to cut off, as the end of a thing; to curtail; to cut
      short; to clip; as, to dock the tail of a horse.
      [1913 Webster]

            His top was docked like a priest biforn. -- Chaucer.
      [1913 Webster]

   2. To cut off a part from; to shorten; to deduct from; to
      subject to a deduction; as, to dock one's wages.
      [1913 Webster]

   3. To cut off, bar, or destroy; as, to dock an entail.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dock \Dock\, n. [Akin to D. dok; of uncertain origin; cf. LL.
   doga ditch, L. doga ditch, L. doga sort of vessel, Gr. ?
   receptacle, fr. ? to receive.]
   1. An artificial basin or an inclosure in connection with a
      harbor or river, -- used for the reception of vessels, and
      provided with gates for keeping in or shutting out the
      tide.
      [1913 Webster]

   2. The slip or water way extending between two piers or
      projecting wharves, for the reception of ships; --
      sometimes including the piers themselves; as, to be down
      on the dock.
      [1913 Webster]

   3. The place in court where a criminal or accused person
      stands.
      [1913 Webster]

   Balance dock, a kind of floating dock which is kept level
      by pumping water out of, or letting it into, the
      compartments of side chambers.

   Dry dock, a dock from which the water may be shut or pumped
      out, especially, one in the form of a chamber having walls
      and floor, often of masonry and communicating with deep
      water, but having appliances for excluding it; -- used in
      constructing or repairing ships. The name includes
      structures used for the examination, repairing, or
      building of vessels, as graving docks, floating docks,
      hydraulic docks, etc.

   Floating dock, a dock which is made to become buoyant, and,
      by floating, to lift a vessel out of water.

   Graving dock, a dock for holding a ship for graving or
      cleaning the bottom, etc.

   Hydraulic dock, a dock in which a vessel is raised clear of
      the water by hydraulic presses.

   Naval dock, a dock connected with which are naval stores,
      materials, and all conveniences for the construction and
      repair of ships.

   Sectional dock, a form of floating dock made in separate
      sections or caissons.

   Slip dock, a dock having a sloping floor that extends from
      deep water to above high-water mark, and upon which is a
      railway on which runs a cradle carrying the ship.

   Wet dock, a dock where the water is shut in, and kept at a
      given level, to facilitate the loading and unloading of
      ships; -- also sometimes used as a place of safety; a
      basin.
      [1913 Webster]

WordNet (r) 3.0 (2006):

dock
    n 1: an enclosure in a court of law where the defendant sits
         during the trial
    2: any of certain coarse weedy plants with long taproots,
       sometimes used as table greens or in folk medicine [syn:
       dock, sorrel, sour grass]
    3: a platform built out from the shore into the water and
       supported by piles; provides access to ships and boats [syn:
       pier, wharf, wharfage, dock]
    4: a platform where trucks or trains can be loaded or unloaded
       [syn: dock, loading dock]
    5: landing in a harbor next to a pier where ships are loaded and
       unloaded or repaired; may have gates to let water in or out;
       "the ship arrived at the dock more than a day late" [syn:
       dock, dockage, docking facility]
    6: the solid bony part of the tail of an animal as distinguished
       from the hair
    7: a short or shortened tail of certain animals [syn: bobtail,
       bob, dock]
    v 1: come into dock; "the ship docked" [ant: undock]
    2: deprive someone of benefits, as a penalty
    3: deduct from someone's wages
    4: remove or shorten the tail of an animal [syn: dock, tail,
       bob]
    5: maneuver into a dock; "dock the ships" [ant: undock]

Moby Thesaurus II by Grady Ward, 1.0:

256 Moby Thesaurus words for "dock":
   L, R, abbreviate, abridge, abscind, abstract, acting area, alight,
   amputate, anchor, anchorage, anchorage ground, annihilate, apron,
   apron stage, archives, armory, arsenal, attic, backstage, ban,
   band shell, bandstand, bank, bar, basement, basin, bay, berth, bin,
   board, bob, boil down, bonded warehouse, bookcase, box, breakwater,
   bridge, brush, bulkhead, bunker, buttery, capsulize, cargo dock,
   cast anchor, cauda, caudal appendage, caudation, cellar, chest,
   clip, closet, come to anchor, come to land, compress, condense,
   conservatory, contract, coulisse, court, courthouse, courtroom,
   crate, crib, crop, cue, cull, cupboard, curtail, cut, cut away,
   cut back, cut down, cut off, cut off short, cut out, cut short,
   debark, debus, deplane, depository, depot, detrain, disembark,
   disemplane, dockage, dockyard, drawer, dressing room, drop anchor,
   drop the hook, dry dock, dump, elide, eliminate, embankment,
   enucleate, epitomize, eradicate, except, exchequer, excise,
   exclude, extinguish, extirpate, fantail, flies, fly floor,
   fly gallery, foreshorten, forestage, glory hole, go ashore, godown,
   greenroom, grid, gridiron, groin, hangar, harbor, harborage, haven,
   hold, housing, hutch, isolate, jetty, jury box, jutty, kedge,
   kedge off, knock off, land, landing, landing place, landing stage,
   lash, lash and tie, lay anchor, levee, library, lightboard, locker,
   lop, lumber room, lumberyard, magasin, magazine, make a landfall,
   make land, make port, marina, mole, moor, moorings, mow, mutilate,
   nip, orchestra, orchestra pit, pare, peel, performing area,
   pick out, pier, pigtail, pit, poll, pollard, port, proscenium,
   proscenium stage, protected anchorage, prune, put in,
   put into port, quay, queue, rack, rattail, reach land, reap, recap,
   recapitulate, reduce, repertory, repository, reservoir, retrench,
   rick, road, roads, roadstead, root out, rule out, seaport, seawall,
   set apart, set aside, shave, shear, shed, shelf, shell, shipyard,
   shorten, slip, snub, stack, stack room, stage, stage left,
   stage right, stamp out, stock room, storage, store, storehouse,
   storeroom, strike off, strip, strip off, stub, stunt, sum up,
   summarize, supply base, supply depot, switchboard, synopsize, tail,
   tailpiece, take in, take off, take out, tank, telescope,
   the boards, tie up, town hall, town house, treasure house,
   treasure room, treasury, trim, truncate, unboat, vat, vault,
   warehouse, wharf, wine cellar, wings, wipe out, witness box,
   witness stand