Source : Webster's Revised Unabridged Dictionary (1913)

Orb \Orb\, n. [OF. orb blind, fr. L. orbus destitute.] (Arch.)
   A blank window or panel. [Obs.] --Oxf. Gloss.

Orb \Orb\, n. [F. orbe, fr. L. orbis circle, orb. Cf. {Orbit}.]
   1. A spherical body; a globe; especially, one of the
      celestial spheres; a sun, planet, or star.

            In the small orb of one particular tear. --Shak.

            Whether the prime orb, Incredible how swift, had
            thither rolled.                       --Milton.

   2. One of the azure transparent spheres conceived by the
      ancients to be inclosed one within another, and to carry
      the heavenly bodies in their revolutions.

   3. A circle; esp., a circle, or nearly circular orbit,
      described by the revolution of a heavenly body; an orbit.

            The schoolmen were like astronomers, which did feign
            eccentrics, and epicycles, and such engines of orbs.
                                                  --Bacon.

            You seem to me as Dian in her orb.    --Shak.

            In orbs Of circuit inexpressible they stood, Orb
            within orb.                           --Milton.

   4. A period of time marked off by the revolution of a
      heavenly body. [R.] --Milton.

   5. The eye, as luminous and spherical. [Poetic]

            A drop serene hath quenched their orbs. --Milton.

   6. A revolving circular body; a wheel. [Poetic]

            The orbs Of his fierce chariot rolled. --Milton.

   7. A sphere of action. [R.] --Wordsworth.

            But in our orbs we'll live so round and safe. --Shak

   8. Same as {Mound}, a ball or globe. See lst {Mound}.

Orb \Orb\, v. t. [imp. & p. p. {Orbed}; p. pr. & vb. n.
   {Orbing}.]
   1. To form into an orb or circle. [Poetic] --Milton. Lowell.

   2. To encircle; to surround; to inclose. [Poetic]

            The wheels were orbed with gold.      --Addison.

Orb \Orb\, v. i.
   To become round like an orb. [Poetic]

         And orb into the perfect star.           --Tennyson.

Source : WordNet®

orb
     n 1: the ball-shaped capsule containing the vertebrate eye [syn:
          {eyeball}]
     2: an object with a spherical shape; "a ball of fire" [syn: {ball},
         {globe}]

Source : Free On-Line Dictionary of Computing

ORB
     
        {Object Request Broker}