In general terms, an ocean basin is the land and associated landforms under the sea or ocean. However, definitions vary with different streams of study but the general definition holds true.

The ocean basin consists of the following (but not limited to) features:

• Continental Shelf
• Continental Slope
• Continental Rise
• Abyssal plains
• Abyssal fans
• Oceanic trench
• Volcanic islands
• Submarine ridges
• Submarine canyons