Source : Webster's Revised Unabridged Dictionary (1913)

Corn \Corn\ (k[^o]rn), n. [L. cornu horn: cf. F. corne horn,
   hornlike excrescence. See {Horn}.]
   A thickening of the epidermis at some point, esp. on the
   toes, by friction or pressure. It is usually painful and
   troublesome.

         Welcome, gentlemen! Ladies that have their toes
         Unplagued with corns, will have a bout with you.
                                                  --Shak.

   Note: The substance of a corn usually resembles horn, but
         where moisture is present, as between the toes, it is
         white and sodden, and is called a {soft corn}.

Corn \Corn\, n. [AS. corn; akin to OS. korn, D. koren, G., Dan.,
   Sw., & Icel. korn, Goth. ka['u]rn, L. granum, Russ. zerno.
   Cf. {Grain}, {Kernel}.]
   1. A single seed of certain plants, as wheat, rye, barley,
      and maize; a grain.

   2. The various farinaceous grains of the cereal grasses used
      for food, as wheat, rye, barley, maize, oats.

   Note: In Scotland, corn is generally restricted to oats, in
         the United States, to maize, or {Indian corn}, of which
         there are several kinds; as, {yellow corn}, which grows
         chiefly in the Northern States, and is yellow when
         ripe; {white or southern corn}, which grows to a great
         height, and has long white kernels; {sweet corn},
         comprising a number of sweet and tender varieties,
         grown chiefly at the North, some of which have kernels
         that wrinkle when ripe and dry; {pop corn}, any small
         variety, used for popping.

   3. The plants which produce corn, when growing in the field;
      the stalks and ears, or the stalks, ears, and seeds, after
      reaping and before thrashing.

            In one night, ere glimpse of morn, His shadowy flail
            had thrashed the corn.                --Milton.

   4. A small, hard particle; a grain. ``Corn of sand.'' --Bp.
      Hall. ``A corn of powder.'' --Beau. & Fl.

   {Corn ball}, a ball of popped corn stuck together with soft
      candy from molasses or sugar.

   {Corn bread}, bread made of Indian meal.

   {Corn cake}, a kind of corn bread; johnny cake; hoecake.

   {Corn cockle} (Bot.), a weed ({Agrostemma or Lychnis
      Githago}), having bright flowers, common in grain fields.
      

   {Corn flag} (Bot.), a plant of the genus {Gladiolus}; --
      called also {sword lily}.

   {Corn fly}. (Zo["o]l.)
      (a) A small fly which, in the larval state, is injurious
          to grain, living in the stalk, and causing the disease
          called ``gout,'' on account of the swelled joints. The
          common European species is {Chlorops t[ae]niopus}.
      (b) A small fly ({Anthomyia ze}) whose larva or maggot
          destroys seed corn after it has been planted.

   {Corn fritter}, a fritter having green Indian corn mixed
      through its batter. [U. S.]

   {Corn laws}, laws regulating trade in corn, especially those
      in force in Great Britain till 1846, prohibiting the
      importation of foreign grain for home consumption, except
      when the price rose above a certain rate.

   {Corn marigold}. (Bot.) See under {Marigold}.

   {Corn oyster}, a fritter containing grated green Indian corn
      and butter, the combined taste resembling that of oysters.
      [U.S.]

   {Corn parsley} (Bot.), a plant of the parsley genus
      ({Petroselinum segetum}), a weed in parts of Europe and
      Asia.

   {Corn popper}, a utensil used in popping corn.

   {Corn poppy} (Bot.), the red poppy ({Papaver Rh[oe]as}),
      common in European cornfields; -- also called {corn rose}.
      

   {Corn rent}, rent paid in corn.

   {Corn rose}. See {Corn poppy}.

   {Corn salad} (Bot.), a name given to several species of
      {Valerianella}, annual herbs sometimes used for salad. {V.
      olitoria} is also called {lamb's lettuce}.

   {Corn stone}, red limestone. [Prov. Eng.]

   {Corn violet} (Bot.), a species of {Campanula}.

   {Corn weevil}. (Zo["o]l.)
      (a) A small weevil which causes great injury to grain.
      (b) In America, a weevil ({Sphenophorus ze[ae]}) which
          attacks the stalk of maize near the root, often doing
          great damage. See {Grain weevil}, under {Weevil}.

Corn \Corn\, v. t. [imp. & p. p. {Corned} (k?rnd); p. pr. & vb.
   n. {Corning}.]
   1. To preserve and season with salt in grains; to sprinkle
      with salt; to cure by salting; now, specifically, to salt
      slightly in brine or otherwise; as, to corn beef; to corn
      a tongue.

   2. To form into small grains; to granulate; as, to corn
      gunpowder.

   3. To feed with corn or (in Sctland) oats; as, to corn
      horses. --Jamieson.

   4. To render intoxicated; as, ale strong enough to corn one.
      [Colloq.]

   {Corning house}, a house or place where powder is corned or
      granulated.

Source : WordNet®

corn
     n 1: tall annual cereal grass bearing kernels on large ears:
          widely cultivated in America in many varieties; the
          principal cereal in Mexico and Central and South America
          since pre-Columbian times [syn: {maize}, {Indian corn},
          {Zea mays}]
     2: the dried grains or kernels or corn used as animal feed or
        ground for meal
     3: ears of corn grown for human food [syn: {edible corn}]
     4: a hard thickening of the skin (especially on the top or
        sides of the toes) caused by the pressure of ill-fitting
        shoes [syn: {clavus}]
     5: annual or biennial grass having erect flower spikes and
        light brown grains [syn: {wheat}]
     6: whiskey distilled from a mash of not less than 80 percent
        corn [syn: {corn whiskey}, {corn whisky}]
     7: something sentimental or trite; "that movie was pure corn"

corn
     v 1: feed (cattle) with corn
     2: preserve with salt; "corned beef"