To orbit is to follow a circular or elliptical path around a central body. Usually a planet, moon or satellite is described as orbiting, but a child who has too much sugar can sometimes orbit around his parents in an annoying fashion.

Orbit comes from the Latin orbita, “course,” or “track.” The verb orbit is the act of revolving around another object, usually on a circular or elliptical course. Many planets, moons, stars, meteors spacecraft and other objects in outer space orbit around each other. Electrons also orbit around the nucleus of an atom. The noun orbit is the path the object in orbit takes: "The Earth’s orbit around the Sun takes one year to complete."

Definitions of orbit
  1. noun
    the (usually elliptical) path described by one celestial body in its revolution about another
    “he plotted the orbit of the moon”
    synonyms: celestial orbit
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    geosynchronous orbit
    a circular orbit around the Earth having a period of 24 hours
    geostationary orbit
    a geosynchronous orbit that is fixed with respect to a position on the Earth
    type of:
    itinerary, path, route
    an established line of travel or access
  2. noun
    the path of an electron around the nucleus of an atom
    synonyms: electron orbit
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    type of:
    itinerary, path, route
    an established line of travel or access
  3. verb
    move in an orbit
    “The moon orbits around the Earth”
    “The planets are orbiting the sun”
    “electrons orbit the nucleus”
    synonyms: orb, revolve
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    move backward in an orbit, of celestial bodies
    type of:
    circle, circulate
    move in circles
  4. noun
    a particular environment or walk of life
    “he's out of my orbit
    synonyms: area, arena, domain, field, sphere
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    the sphere of work by women
    a sphere of activity involving effort
    kingdom, land, realm
    a domain in which something is dominant
    an area of control or responsibility
    political arena, political sphere
    a sphere of intense political activity
    a domain that seems to be specially reserved for someone
    province, responsibility
    the proper sphere or extent of your activities
    lotus land, lotusland
    an idyllic realm of contentment and self-indulgence
    lap of the gods
    beyond human control or responsibility
    ecclesiastical province
    the district within the jurisdiction of an archbishop or a metropolitan or one of the territorial divisions of an ecclesiastical order
    type of:
    the totality of surrounding conditions
  5. noun
    the bony cavity in the skull containing the eyeball
    synonyms: cranial orbit, eye socket, orbital cavity
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    type of:
    bodily cavity, cavity, cavum
    (anatomy) a natural hollow or sinus within the body
  6. noun
    an area in which something acts or operates or has power or control: "the range of a supersonic jet"
    “in the political orbit of a world power”
    synonyms: ambit, compass, range, reach, scope
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    approximate range, ballpark
    near to the scope or range of something
    confines, pale
    a bounded scope
    the range of optical density and tone on a photographic negative or print (or the extent to which adjacent areas on a television screen differ in brightness)
    internationalism, internationality
    quality of being international in scope
    scope for freedom of e.g. action or thought; freedom from restriction
    horizon, purview, view
    the range of interest or activity that can be anticipated
    expanse, sweep
    a wide scope
    a complete extent or range: "a face that expressed a gamut of emotions"
    a broad range of related objects, values, qualities, ideas, or activities
    palette, pallet
    the range of colour characteristic of a particular artist or painting or school of art
    type of:
    the distance or area or volume over which something extends
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