Source : Webster's Revised Unabridged Dictionary (1913)

Horse \Horse\, n. (Student Slang)
      (a) A translation or other illegitimate aid in study or
          examination; -- called also {trot}, {pony}, {Dobbin}.
      (b) Horseplay; tomfoolery.

Horse \Horse\ (h[^o]rs), n. [AS. hors; akin to OS. hros, D. &
   OHG. ros, G. ross, Icel. hross; and perh. to L. currere to
   run, E. course, current Cf. {Walrus}.]
   1. (Zo["o]l.) A hoofed quadruped of the genus {Equus};
      especially, the domestic horse ({E. caballus}), which was
      domesticated in Egypt and Asia at a very early period. It
      has six broad molars, on each side of each jaw, with six
      incisors, and two canine teeth, both above and below. The
      mares usually have the canine teeth rudimentary or
      wanting. The horse differs from the true asses, in having
      a long, flowing mane, and the tail bushy to the base.
      Unlike the asses it has callosities, or chestnuts, on all
      its legs. The horse excels in strength, speed, docility,
      courage, and nobleness of character, and is used for
      drawing, carrying, bearing a rider, and like purposes.

   Note: Many varieties, differing in form, size, color, gait,
         speed, etc., are known, but all are believed to have
         been derived from the same original species. It is
         supposed to have been a native of the plains of Central
         Asia, but the wild species from which it was derived is
         not certainly known. The feral horses of America are
         domestic horses that have run wild; and it is probably
         true that most of those of Asia have a similar origin.
         Some of the true wild Asiatic horses do, however,
         approach the domestic horse in several characteristics.
         Several species of fossil ({Equus}) are known from the
         later Tertiary formations of Europe and America. The
         fossil species of other genera of the family
         {Equid[ae]} are also often called horses, in general
         sense.

   2. The male of the genus horse, in distinction from the
      female or male; usually, a castrated male.



   3. Mounted soldiery; cavalry; -- used without the plural
      termination; as, a regiment of horse; -- distinguished
      from foot.

            The armies were appointed, consisting of twenty-five
            thousand horse and foot.              --Bacon.

   4. A frame with legs, used to support something; as, a
      clotheshorse, a sawhorse, etc.

   5. A frame of timber, shaped like a horse, on which soldiers
      were made to ride for punishment.

   6. Anything, actual or figurative, on which one rides as on a
      horse; a hobby.

   7. (Mining) A mass of earthy matter, or rock of the same
      character as the wall rock, occurring in the course of a
      vein, as of coal or ore; hence, to take horse -- said of a
      vein -- is to divide into branches for a distance.

   8. (Naut.)
      (a) See {Footrope}, a.
      (b) A breastband for a leadsman.
      (c) An iron bar for a sheet traveler to slide upon.
      (d) A jackstay. --W. C. Russell. --Totten.

   Note: Horse is much used adjectively and in composition to
         signify of, or having to do with, a horse or horses,
         like a horse, etc.; as, horse collar, horse dealer or
         horse?dealer, horsehoe, horse jockey; and hence, often
         in the sense of strong, loud, coarse, etc.; as,
         horselaugh, horse nettle or horse-nettle, horseplay,
         horse ant, etc.

   {Black horse}, {Blood horse}, etc. See under {Black}, etc.

   {Horse aloes}, caballine aloes.

   {Horse ant} (Zo["o]l.), a large ant ({Formica rufa}); --
      called also {horse emmet}.

   {Horse artillery}, that portion of the artillery in which the
      cannoneers are mounted, and which usually serves with the
      cavalry; flying artillery.

   {Horse balm} (Bot.), a strong-scented labiate plant
      ({Collinsonia Canadensis}), having large leaves and
      yellowish flowers.

   {Horse bean} (Bot.), a variety of the English or Windsor bean
      ({Faba vulgaris}), grown for feeding horses.

   {Horse boat}, a boat for conveying horses and cattle, or a
      boat propelled by horses.

   {Horse bot}. (Zo["o]l.) See {Botfly}, and {Bots}.

   {Horse box}, a railroad car for transporting valuable horses,
      as hunters. [Eng.]

   {Horse} {breaker or trainer}, one employed in subduing or
      training horses for use.

   {Horse car}.
      (a) A railroad car drawn by horses. See under {Car}.
      (b) A car fitted for transporting horses.

   {Horse cassia} (Bot.), a leguminous plant ({Cassia
      Javanica}), bearing long pods, which contain a black,
      catharic pulp, much used in the East Indies as a horse
      medicine.

   {Horse cloth}, a cloth to cover a horse.

   {Horse conch} (Zo["o]l.), a large, spiral, marine shell of
      the genus Triton. See {Triton}.

   {Horse courser}.
      (a) One that runs horses, or keeps horses for racing.
          --Johnson.
      (b) A dealer in horses. [Obs.] --Wiseman.

   {Horse crab} (Zo["o]l.), the Limulus; -- called also
      {horsefoot}, {horsehoe crab}, and {king crab}.

   {Horse crevall['e]} (Zo["o]l.), the cavally.

Horse \Horse\, v. t. [imp. & p. p. {Horsed}; p. pr. & vb. n.
   {Horsing}.] [AS. horsion.]
   1. To provide with a horse, or with horses; to mount on, or
      as on, a horse. ``Being better horsed, outrode me.''
      --Shak.

   2. To sit astride of; to bestride. --Shak.

   3. To cover, as a mare; -- said of the male.

   4. To take or carry on the back; as, the keeper, horsing a
      deer. --S. Butler.

   5. To place on the back of another, or on a wooden horse,
      etc., to be flogged; to subject to such punishment.

Horse \Horse\, v. i.
   To get on horseback. [Obs.] --Shelton.

Source : WordNet®

horse
     n 1: solid-hoofed herbivorous quadruped domesticated since
          prehistoric times [syn: {Equus caballus}]
     2: a padded gymnastic apparatus on legs
     3: troops trained to fight on horseback; "500 horse led the
        attack" [syn: {cavalry}, {horse cavalry}]
     4: a framework for holding wood that is being sawed [syn: {sawhorse},
         {sawbuck}, {buck}]
     5: a chessman in the shape of a horse's head; can move two
        squares horizontally and one vertically (or vice versa)
        [syn: {knight}]

horse
     v : provide with a horse or horses