/ Dictionary / Index O ocean: Meaning and Definition of Find definitions for: o•cean Pronunciation: (ō'shun), [key] — n. the vast body of salt water that covers almost three fourths of the earth's surface. any of the geographical divisions of this body, commonly given as the Atlantic, Pacific, Indian, Arctic, and Antarctic oceans. a vast expanse or quantity: an ocean of grass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ocean (Thesaurus) OCDM oceanarium Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language