Learner's definition of OCEAN
the salt water that covers much of the Earth's surface
— often used with the
They lived near the ocean. [=the sea]
He had never seen the ocean before.
There's a storm moving in from the ocean.
The ship quickly sank to the bottom of the ocean.
the deepest parts of the ocean
— often used before another noun
see color picture on this page
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
— often plural
a drop in the ocean