Ocean vs Seas - What's the difference?

As nouns the difference between ocean and seas

is that ocean is ocean while seas is .

(en noun)

(countable) One of the five large bodies of water separating the continents.

(uncountable) Water belonging to an ocean.

The island is surrounded by ocean

(figuratively) An immense expanse; any vast space or quantity without apparent limits.

the boundless ocean of eternity

an ocean of affairs

* (large body of water) the ogin (qualifier)

* a drop in the ocean * Oceania * oceanic * oceanography * ocean tramp * Oceanus