ocean

Pronunciation: \ˈō-shən\
Function: noun
Usage: often attributive
Etymology: Middle English occean, from Anglo-French, from Latin oceanus, from Greek Ōkeanos, a river thought of as encircling the earth, ocean
Date: 14th century
1 a: the whole body of salt water that covers nearly three fourths of the surface of the earth b: any of the large bodies of water (as the Atlantic Ocean) into which the great ocean is divided
2: a very large or unlimited space or quantity