Source : Webster's Revised Unabridged Dictionary (1913)

Orbit \Or"bit\, n. [L. orbita a track or rut made by a wheel,
   course, circuit, fr. orbis a circle: cf. F. orbite. See 2d
   {Orb}.]
   1. (Astron.) The path described by a heavenly body in its
      periodical revolution around another body; as, the orbit
      of Jupiter, of the earth, of the moon.

   2. An orb or ball. [Rare & Improper]

            Roll the lucid orbit of an eye.       --Young.

   3. (Anat.) The cavity or socket of the skull in which the eye
      and its appendages are situated.

   4. (Zo["o]l.) The skin which surrounds the eye of a bird.

Source : WordNet®

orbit
     v : move in an orbit; "The moon orbits around the Earth"; "The
         planets are orbiting the sun"; "electrons orbit the
         nucleus" [syn: {revolve}]

orbit
     n 1: the (usually elliptical) path described by one celestial
          body in its revolution about another; "he plotted the
          orbit of the moon" [syn: {celestial orbit}]
     2: a particular environment or walk of life; "his social sphere
        is limited"; "it was a closed area of employment"; "he's
        out of my orbit" [syn: {sphere}, {domain}, {area}, {field},
         {arena}]
     3: an area in which something acts or operates or has power or
        control: "the range of a supersonic jet"; "the ambit of
        municipal legislation"; "within the compass of this
        article"; "within the scope of an investigation"; "outside
        the reach of the law"; "in the political orbit of a world
        power" [syn: {scope}, {range}, {reach}, {compass}, {ambit}]
     4: the path of an electron around the nucleus of an atom [syn:
        {electron orbit}]
     5: the bony cavity in the skull containing the eyeball [syn: {eye
        socket}, {cranial orbit}, {orbital cavity}]

Source : Free On-Line Dictionary of Computing

Orbit
     
        A {Scheme} compiler.
     
        ["Orbit: An Optimising Compiler for Scheme", D.A. Kranz et al,
        SIGPLAN Notices 21(7):281-292 (Jul 1986)].
     
        (1994-10-28)