/ Dictionary / Index O Oceanus: Meaning and Definition of Find definitions for: O•ce•a•nus Pronunciation: (ō-sē'u-nus), [key] — n. Class. Myth. a Titan who was the son of Uranus and Gaea, the consort of Tethys, and the father of the river gods and Oceanids. a great stream of water encircling the earth and believed to be the source of all rivers, lakes, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oceanus (Thesaurus) ocean sunfish Oceanus Procellarum Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language