You know that vast, wet expanse of blue that keeps crashing waves on the beach? That's the ocean.
Atlantic, Pacific, Indian...these are just a few of the big oceans of the world. If Columbus hadn't sailed the ocean blue in 14 hundred ninety-two, America would have never been discovered. Home to sharks, mermaids, sailboats, and tsunami waves, the ocean makes up most of the planet Earth. But you can use ocean to describe anything similarly vast and limitless, like an endless ocean of fans at a rock concert.
