orbit in WordNet English dictionary

1. an area in which something acts or operates or has power or control: "the range of a supersonic jet"
   "a piano has a greater range than the human voice"; "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"
   scope  range  reach  orbit  compass  ambit 
   
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"
   sphere  domain  area  orbit  field  arena 
   
3. the (usually elliptical) path described by one celestial body in its revolution about another
   "he plotted the orbit of the moon"
   orbit  celestial orbit 
   
4. the bony cavity in the skull containing the eyeball
   eye socket  orbit  cranial orbit  orbital cavity 
   
5. the path of an electron around the nucleus of an atom
   orbit  electron orbit 
   

1. move in an orbit
   "The moon orbits around the Earth"; "The planets are orbiting the sun"; "electrons orbit the nucleus"
   orb  orbit  revolve