Uranusfalse-color image taken by the Hubble Space Telescope in 1998U·ra·nus (yo?o-r??n?s, yo?or??-n?s)n.1. Greek Mythology The earliest supreme god, a personification of the sky, who was the son and consort of Gaea and the father of the Cyclopes and Titans.2. The seventh planet from the sun, revolving about it every 84.01 years at a mean distance of approximately 2.9 billion kilometers (1.8 billion miles), having a mean equatorial diameter of 51,118 kilometers (31,763 miles) and a mass 14.6 times that of Earth.[Late Latin ?ranus, from Greek ouranos, heaven, the god Uranus, Sense 2, from New Latin ?ranussince Uranus was Saturn’s father just as Saturn was Jupiter’s father (thus making the order of the planets’ names reflect mythological genealogy).]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Uranus (j??re?n?s; ?j?r?n?s) n (Classical Myth & Legend) Greek myth the personification of the sky, who, as a god, ruled the universe and fathered the Titans and Cyclopes on his wife and mother Gaea (earth). He was overthrown by his son CronusUranus (j??re?n?s; ?j?r?n?s) n (Celestial Objects) one of the giant planets, the seventh planet from the sun, sometimes visible to the naked eye. It has 27 satellites, a ring system, and an axis of rotation almost lying in the plane of the orbit. Mean distance from sun: 2870 million km; period of revolution around sun: 84 years; period of axial rotation: 17.23 hours; diameter and mass: 4 and 14.5 times that of earth respectively[C19: from Latin ?ranus, from Greek Ouranos heaven]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014U?ra?nus (?y??r ? n?s, y??re?-) n. 1. the planet seventh in order from the sun, having an equatorial diameter of 32,600 miles (56,460 km), a mean distance from the sun of 1,784 million miles (2871 million km), a period of revolution of 84.07 years, and 15 known moons. 2. (in Greek myth) a personification of the sky, engendered by Gaea, with whom Uranus mates to produce the Cyclopes and Titans. [