Source : Webster's Revised Unabridged Dictionary (1913)

Neither \Nei"ther\, conj.
   not either; generally used to introduce the first of two or
   more co["o]rdinate clauses of which those that follow begin
   with nor.

         Fight neither with small nor great, save only with the
         king.                                    --1 Kings
                                                  xxii. 31.

         Hadst thou been firm and fixed in thy dissent, Neither
         had I transgressed, nor thou with me.    --Milton.

         When she put it on, she made me vow That I should
         neither sell, nor give, nor lose it.     --Shak.

   Note: Neither was formerly often used where we now use nor.
         ``For neither circumcision, neither uncircumcision is
         anything at all.'' --Tyndale. ``Ye shall not eat of it,
         neither shall ye touch it.'' --Gen. iii. 3. Neither is
         sometimes used colloquially at the end of a clause to
         enforce a foregoing negative (nor, not, no). ``He is
         very tall, but not too tall neither.'' --Addison. '' `I
         care not for his thrust' `No, nor I neither.''' --Shak.

   {Not so neither}, by no means. [Obs.] --Shak.

Neither \Nei"ther\ (? or ?; 277), a. [OE. neiter, nother,
   nouther, AS. n[=a]w?er, n[=a]hw[ae]?er; n[=a] never, not +
   hw[ae]?er whether. The word has followed the form of either.
   See {No}, and {Whether}, and cf. {Neuter}, {Nor}.]
   Not either; not the one or the other.

         Which of them shall I take? Both? one? or neither?
         Neither can be enjoyed, If both remain alive. --Shak.

         He neither loves, Nor either cares for him. --Shak.

Source : WordNet®

neither
     adv : after a negative statement used to indicate that the next
           statement is similarly negative; "I was not happy and
           neither were they"; "just as you would not complain,
           neither should he"