Pronunciation: (ō'shun), [key]
1. the vast body of salt water that covers almost three fourths of the earth's surface.
2. any of the geographical divisions of this body, commonly given as the Atlantic, Pacific, Indian, Arctic, and Antarctic oceans.
3. a vast expanse or quantity: an ocean of grass.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.