The Collaborative International Dictionary of English v.0.48:

Half \Half\ (h[aum]f), n.; pl. Halves (h[aum]vz). [AS. healf.
   See Half, a.]
   1. Part; side; behalf. [Obs.] --Wyclif.
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            The four halves of the house.         --Chaucer.
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   2. One of two equal parts into which anything may be divided,
      or considered as divided; -- sometimes followed by of; as,
      a half of an apple.
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            Not half his riches known, and yet despised.
                                                  --Milton.
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            A friendship so complete
            Portioned in halves between us.       --Tennyson.
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   Better half. See under Better.

   In half, in two; an expression sometimes used improperly
      instead of in halves or into halves; as, to cut in
      half. [Colloq.] --Dickens.

   In one's half or On one's half, in one's behalf; on one's
      part. [Obs.]

   To cry halves, to claim an equal share with another.

   To go halves, to share equally between two.
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The Collaborative International Dictionary of English v.0.48:

Halves \Halves\ (h[aum]vz), n.,
   pl. of Half.
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   By halves, by one half at once; halfway; fragmentarily;
      partially; incompletely.
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            I can not believe by halves; either I have faith, or
            I have it not.                        --J. H.
                                                  Newman.
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   To go halves. See under Go.
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