Source : Webster's Revised Unabridged Dictionary (1913)

Neck \Neck\, 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.

   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.

   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.

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

   {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.
      ``Commiting 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. ``What
      they presume to borrow from her sage and virtuous rules .
      . . breaks the neck of their own cause.'' --Milton.

Source : WordNet®

neck and neck
     adj : inconclusive as to outcome; close or just even in a race or
           comparison or competition; "as they approached the
           finish line they were neck and neck"; "the election was
           a nip and tuck affair" [syn: {head-to-head}, {nip and
           tuck}]
     adv : even or close in a race or competition or comparison; "the
           horses ran neck and neck"; "he won nip and tuck" [syn:
           {head-to-head}, {nip and tuck}]