1. A large body of water constituting a principal part of the hydrosphere
   "The Pacific Ocean is the largest and deepest of Earth's oceanic divisions"
    
2. Anything apparently limitless in quantity or volume
   "There was an ocean of paperwork on his desk";
   - sea

Derived forms: oceans

Type of: body of water, large indefinite amount, large indefinite quantity, water

Part of: hydrosphere

Encyclopedia: Ocean, Maryland