Source : Webster's Revised Unabridged Dictionary (1913)

Half \Half\ (h[aum]f), a. [AS. healf, half, half; as a noun,
   half, side, part; akin to OS., OFries., & D. half, G. halb,
   Sw. half, Dan. halv, Icel. h[=a]lfr, Goth. halbs. Cf.
   {Halve}, {Behalf}.]
   1. Consisting of a moiety, or half; as, a half bushel; a half
      hour; a half dollar; a half view.

   Note: The adjective and noun are often united to form a
         compound.

   2. Consisting of some indefinite portion resembling a half;
      approximately a half, whether more or less; partial;
      imperfect; as, a half dream; half knowledge.

            Assumed from thence a half consent.   --Tennyson.

   {Half ape} (Zo["o]l.), a lemur.

   {Half back}. (Football) See under 2d {Back}.

   {Half bent}, the first notch, for the sear point to enter, in
      the tumbler of a gunlock; the halfcock notch.

   {Half binding}, a style of bookbinding in which only the back
      and corners are in leather.

   {Half boarder}, one who boards in part; specifically, a
      scholar at a boarding school who takes dinner only.

   {Half-breadth plan} (Shipbuilding), a horizontal plan of the
      half a vessel, divided lengthwise, showing the lines.

   {Half cadence} (Mus.), a cadence on the dominant.

   {Half cap}, a slight salute with the cap. [Obs.] --Shak.

   {A half cock}, the position of the cock of a gun when
      retained by the first notch.

Half \Half\, v. t.
   To halve. [Obs.] See {Halve}. --Sir H. Wotton.

Half \Half\, adv.
   In an equal part or degree; in some pa? appro?mating a half;
   partially; imperfectly; as, half-colored, half done,
   half-hearted, half persuaded, half conscious. ``Half loth and
   half consenting.'' --Dryden.

         Their children spoke halfin the speech of Ashdod.
                                                  --Neh. xiii.
                                                  24

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.

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)]