The Collaborative International Dictionary of English v.0.48:

Neck \Neck\ (n[e^]k), n. [OE. necke, AS. hnecca; akin to D. nek
   the nape of the neck, G. nacken, OHG. nacch, hnacch, Icel.
   hnakki, Sw. nacke, Dan. nakke.]
   1. The part of an animal which connects the head and the
      trunk, and which, in man and many other animals, is more
      slender than the trunk.
      [1913 Webster]

   2. Any part of an inanimate object corresponding to or
      resembling the neck of an animal; as:
      (a) The long slender part of a vessel, as a retort, or of
          a fruit, as a gourd.
      (b) A long narrow tract of land projecting from the main
          body, or a narrow tract connecting two larger tracts.
      (c) (Mus.) That part of a violin, guitar, or similar
          instrument, which extends from the head to the body,
          and on which is the finger board or fret board.
          [1913 Webster]

   3. (Mech.) A reduction in size near the end of an object,
      formed by a groove around it; as, a neck forming the
      journal of a shaft.
      [1913 Webster]

   4. (Bot.) the point where the base of the stem of a plant
      arises from the root.
      [1913 Webster]

   Neck and crop, completely; wholly; altogether; roughly and
      at once. [Colloq.]

   Neck and neck (Racing), so nearly equal that one cannot be
      said to be before the other; very close; even; side by
      side.

   Neck of a capital. (Arch.) See Gorgerin.

   Neck of a cascabel (Gun.), the part joining the knob to the
      base of the breech.

   Neck of a gun, the small part of the piece between the
      chase and the swell of the muzzle.

   Neck of a tooth (Anat.), the constriction between the root
      and the crown.

   Neck or nothing (Fig.), at all risks.

   Neck verse.
      (a) The verse formerly read to entitle a party to the
          benefit of clergy, said to be the first verse of the
          fifty-first Psalm, "Miserere mei," etc. --Sir W.
          Scott.
      (b) Hence, a verse or saying, the utterance of which
          decides one's fate; a shibboleth.

                These words, "bread and cheese," were their neck
                verse or shibboleth to distinguish them; all
                pronouncing "broad and cause," being presently
                put to death.                     --Fuller.

   Neck yoke.
      (a) A bar by which the end of the tongue of a wagon or
          carriage is suspended from the collars of the
          harnesses.
      (b) A device with projecting arms for carrying things (as
          buckets of water or sap) suspended from one's
          shoulders.

   On the neck of, immediately after; following closely; on
      the heel of. "Committing one sin on the neck of another."
      --W. Perkins.

   Stiff neck, obstinacy in evil or wrong; inflexible
      obstinacy; contumacy. "I know thy rebellion, and thy stiff
      neck." --Deut. xxxi. 27.

   To break the neck of, to destroy the main force of; to
      break the back of. "What they presume to borrow from her
      sage and virtuous rules . . . breaks the neck of their own
      cause." --Milton.

   To harden the neck, to grow obstinate; to be more and more
      perverse and rebellious. --Neh. ix. 17.

   To tread on the neck of, to oppress; to tyrannize over.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

neck \neck\, v. i.
   To kiss and caress amorously. [Colloq.] -- n. necking.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Neck \Neck\, v. t. [imp. & p. p. Necked; p. pr. & vb. n.
   Necking.] (Mech.)
   To reduce the diameter of (an object) near its end, by making
   a groove around it; -- used with down; as, to neck down a
   shaft.
   [1913 Webster]

WordNet (r) 3.0 (2006):

neck
    n 1: the part of an organism (human or animal) that connects the
         head to the rest of the body; "he admired her long graceful
         neck"; "the horse won by a neck" [syn: neck, cervix]
    2: a narrow elongated projecting strip of land
    3: a cut of meat from the neck of an animal
    4: a narrow part of an artifact that resembles a neck in
       position or form; "the banjo had a long neck"; "the bottle
       had a wide neck"
    5: an opening in a garment for the neck of the wearer; a part of
       the garment near the wearer's neck [syn: neck, neck
       opening]
    v 1: kiss, embrace, or fondle with sexual passion; "The couple
         were necking in the back seat of the car" [syn: neck,
         make out]

Moby Thesaurus II by Grady Ward, 1.0:

180 Moby Thesaurus words for "neck":
   abbreviation, advocate, alpenstock, and quarter, ankle, arm,
   articulation, astriction, astringency, athletic supporter, back,
   backbone, backing, bandeau, bearer, bill and coo, bottleneck,
   boundary, bra, brace, bracer, bracket, brassiere, breast, butt,
   buttress, canal, cane, carrier, cervix, channel, chicken foot,
   circumscription, clinch, closure, coarctation, compactedness,
   compaction, compression, compressure, concentration, condensation,
   connecting link, connecting rod, connection, consolidation,
   constriction, constringency, contraction, contracture, copulate,
   corset, coupling, crook, crutch, curtailment, dally, dark meat,
   decapitate, decollate, decrease, defile, diminuendo, dovetail,
   draw, drumstick, elbow, embrace, foundation garment, fulcrum,
   gibbet, giblets, girdle, gliding joint, guillotine, guy, guywire,
   hang, head, hinge, hinged joint, hip, hourglass, hourglass figure,
   interface, isthmus, jock, jockstrap, join, joining, joint,
   juncture, knee, knitting, knuckle, leg, link, lollygag, lynch,
   mainstay, maintainer, make love, make out, mast, miter, mortise,
   narrow, narrow place, narrowing, narrows, noose, oyster, pass, pet,
   pivot, pivot joint, prop, puckering, pursing, rabbet, reduction,
   reinforce, reinforcement, reinforcer, rest, resting place, rigging,
   scarf, scrag, seam, shortening, shoulder, shroud, smooch,
   solidification, spine, spoon, sprit, staff, standing rigging,
   stave, stay, stick, stiffener, stitch, strait, stranglement,
   strangulation, strengthener, stretch, striction, stricture,
   string up, support, supporter, sustainer, suture, sweet-talk,
   symphysis, systole, thigh, throat, tie rod, toggle, toggle joint,
   toy, trifle, turkey foot, union, upholder, walking stick, wanton,
   wasp waist, weld, whisper sweet nothings, white meat, wing,
   wishbone, wrinkling, wrist



Easton's 1897 Bible Dictionary:

Neck
   used sometimes figuratively. To "lay down the neck" (Rom. 16:4)
   is to hazard one's life. Threatenings of coming judgments are
   represented by the prophets by their laying bands upon the
   people's necks (Deut. 28:48; Isa. 10:27; Jer. 27:2). Conquerors
   put their feet on the necks of their enemies as a sign of their
   subjection (Josh. 10:24; 2 Sam. 22:41).