Source : Webster's Revised Unabridged Dictionary (1913)

Half \Half\, n.; pl. {Halves}. [AS. healf. See {Half}, a.]
   1. Part; side; behalf. [Obs.] --Wyclif.

            The four halves of the house.         --Chaucer.

   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.

            Not half his riches known, and yet despised.
                                                  --Milton.

            A friendship so complete Portioned in halves between
            us.                                   --Tennyson.

   {Better half}. See under {Better}.

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

   {In, 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.

Halves \Halves\, n.,
   pl. of {Half}.

   {By halves}, by one half at once; halfway; fragmentarily;
      partially; incompletely.

            I can not believe by halves; either I have faith, or
            I have it not.                        --J. H.
                                                  Newman.

   {To go halves}. See under {Go}.

Source : WordNet®

half
     adj 1: consisting of one of two equivalent parts in value or
            quantity; "a half chicken"; "lasted a half hour" [syn:
             {half(a)}]
     2: partial; "gave me a half smile"; "he did only a half job"
        [syn: {half(a)}]
     3: (of siblings) related through one parent only; "a half
        brother"; "half sister" [ant: {whole}]
     [also: {halves} (pl)]

half
     n 1: one of two equal parts of a divisible whole; "half a loaf";
          "half an hour"; "a century and one half" [syn: {one-half}]
     2: in various games or performances: either of two periods of
        play separated by an interval
     [also: {halves} (pl)]

half
     adv : partially or to the extent of a half; "he was half hidden by
           the bushes"
     [also: {halves} (pl)]

halves
     See {half}