—n. 1. the planet Earth (usually prec. by the).
2. a planet or other celestial body.
3. a sphere on which is depicted a map of the earth (terrestrial globe) or of the heavens (celestial globe). 4. a spherical body; sphere.
5. anything more or less spherical, as a lampshade or a glass fishbowl.
6. a golden ball traditionally borne as an emblem of sovereignty; orb.