noun, often attributive \ˈō-shən\

: the salt water that covers much of the Earth's surface

: one of the five large areas of salt water that cover much of the Earth's surface

: a very large number or amount of something

Full Definition of OCEAN

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
:  a very large or unlimited space or quantity

Examples of OCEAN

  1. We've sailed across hundreds of miles of ocean.
  2. the Pacific and Indian oceans

Origin of OCEAN

Middle English occean, from Anglo-French, from Latin oceanus, from Greek Ōkeanos, a river thought of as encircling the earth, ocean
First Known Use: 14th century

Other Oceanography Terms

littoral, sound

Rhymes with OCEAN


Next Word in the Dictionary: oceanariumPrevious Word in the Dictionary: OCDAll Words Near: ocean
March 29, 2015
discomfit Hear it
To thwart or disconcert
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears