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}]
     v : move in an orbit; "The moon orbits around the Earth"; "The
         planets are orbiting the sun"; "electrons orbit the
         nucleus" [syn: {revolve}]
Source: WordNet® 2.0