Source : Webster's Revised Unabridged Dictionary (1913)

Neuter \Neu"ter\, n.
   1. A person who takes no part in a contest; one who is either
      indifferent to a cause or forbears to interfere; a
      neutral.

            The world's no neuter; it will wound or save.
                                                  --Young.

   2. (Gram.)
      (a) A noun of the neuter gender; any one of those words
          which have the terminations usually found in neuter
          words.
      (b) An intransitive verb.

   3. (Biol.) An organism, either vegetable or animal, which at
      its maturity has no generative organs, or but imperfectly
      developed ones, as a plant without stamens or pistils, as
      the garden Hydrangea; esp., one of the imperfectly
      developed females of certain social insects, as of the ant
      and the common honeybee, which perform the labors of the
      community, and are called workers.

Neuter \Neu"ter\, a. [L., fr. ne not + uter whether; akin to E.
   whether. See {No}, and {Whether}, and cf. {Neither}.]
   1. Neither the one thing nor the other; on neither side;
      impartial; neutral. [Archaic]

            In all our undertakings God will be either our
            friend or our enemy; for Providence never stands
            neuter.                               --South.

   2. (Gram.)
      (a) Having a form belonging more especially to words which
          are not appellations of males or females; expressing
          or designating that which is of neither sex; as, a
          neuter noun; a neuter termination; the neuter gender.
      (b) Intransitive; as, a neuter verb.

   3. (Biol.) Having no generative organs, or imperfectly
      developed ones; sexless. See {Neuter}, n., 3.

Source : WordNet®

neuter
     adj 1: of grammatical gender; "`it' is the third-person singular
            neuter pronoun" [ant: {masculine}, {feminine}]
     2: having no or imperfectly developed or nonfunctional sex
        organs [syn: {sexless}]

neuter
     n : a gender that refers chiefly (but not exclusively) to
         inanimate objects (neither masculine nor feminine)
     v : remove the ovaries of; "Is your cat spayed?" [syn: {alter},
         {spay}, {castrate}]