To save this word, you'll need to log in.
Definition of ocean
1a : 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 (such as the Atlantic Ocean) into which the great ocean is divided
2 : a very large or unlimited space or quantity
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Semantic Drift Quiz
- Which of the following was once a synonym for fun?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share ocean
Time Traveler for ocean
The first known use of ocean was in the 14th century
See more words from the same century