1. Greek Mythology a god who is the personification of the heavens, the son and husband of Gaea (Earth) and father of the Titans, Furies, and Cyclopes: he is overthrown by his son Cronus (Saturn)
2. the third largest planet of the solar system and the seventh in distance from the sun: it has a system of thin rings around
the equator: diameter, c. 51,120 km (c. 31,770 mi); period of revolution, c. 84.01 earth years; period of rotation (retrograde), c. 17.24 hours around an axis tilted 98° to its orbital plane; 27 satellites; symbol, ♅
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'Uranus'LL < Gr Ouranos, lit., heaven; (sense 2) ModL