the white object that circles the Earth and can be seen in the night sky; an object similar to the moon that circles another PLANET
One day we will live on the moon.

a large body of salt water that covers most of the surface of the earth
I think it’s too cold to swim in ocean.

to live somewhere for a short amount of time
My mother made me stay home today.

to go somewhere for a short period of time
The President of Russia will visit Korea.