any or all of the large expanses of salt water that together cover much nearly ¾ of the earth's surface
How inappropriate to call this planet Earth when it is clearly Ocean — Arthur C Clarke
literary the sea
informal (in pl) a huge amount
No need to hurry, we've got oceans of time
oceanic /ohshiʹanik/ adj
[Middle English occean via Latin from Greek Ōkeanos a river once believed to encircle the earth, at that time thought to consist of a single land mass]