an ocean bordered by the American continents, Asia, and Australia: largest ocean in the world; divided by the equator into the North Pacific and the South Pacific. 70,000,000 sq. mi. (181,300,000 sq. km); greatest known depth, 35,433 ft. (10,800 m).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.