<p><strong>Noun:</strong></p><ul><li>the curved path, usually elliptical, taken by a planet, satellite, spaceship, etc., around a celestial body, as the sun.</li><li>the usual course of one's life or range of one's activities.</li><li>the sphere of power or influence, as of a nation or person: a small nation in the Russian orbit.</li><li>Physics: (in the Bohr model) the path traced by an electron revolving around the nucleus of an atom.</li><li>an orb or sphere.</li><li>Anatomy: the bony cavity of the skull that contains the eye; eye socket.</li><li>the eye.</li><li>Zoology: the part surrounding the eye of a bird or insect.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>to move or travel around in an orbital or elliptical path: The earth orbits the sun once every 365.25 days.</li><li>to send into orbit, as a satellite.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>to go or travel in an orbit.</li></ul>