Source : Webster's Revised Unabridged Dictionary (1913)

Neutralize \Neu"tral*ize\, v. t. [imp. & p. p. {Neutralized}; p.
   pr. & vb. n. {Neutralizing}.] [Cf. F. neutraliser.]
   1. To render neutral; to reduce to a state of neutrality.

            So here I am neutralized again.       --Sir W.
                                                  Scott.

   2. (Chem.) To render inert or imperceptible the peculiar
      affinities of, as a chemical substance; to destroy the
      effect of; as, to neutralize an acid with a base.

   3. To destroy the peculiar or opposite dispositions of; to
      reduce to a state of indifference inefficience; to
      counteract; as, to neutralize parties in government; to
      neutralize efforts, opposition, etc.

            Counter citations that neutralize each other. --E.
                                                  Everett.