Pronunciation: (ō-sē'u-nus), [key]
—n. Class. Myth.
1. a Titan who was the son of Uranus and Gaea, the consort of Tethys, and the father of the river gods and Oceanids.
2. 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.