noun /ˈplanɪt,ˈplænət/
a) Any of various rocky or gaseous spherical bodies orbiting the Sun, specifically the eight major bodies of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. (The Galilean moons, four major asteroids, and the dwarf planet Pluto were formerly included, in the 17th, 19th, and 20th centuries respectively.)
The moon . . . began to rise from her bed, where she had slumbered away the day, in order to sit up all night. Jones had not travelled far before he paid his compliments to that beautiful planet, and, turning to his companion, asked him if he had ever beheld so delicious an evening?
b) Any similar spherically shaped or tidally elongated body in orbit around a star or binary star which has cleared the debris out of its orbital path, but which has not attained nuclear fusion.
Wikipedia foundation.