Read the dictionary definition of belly. All definitions for this word.
1. the underpart of the body of certain vertebrates such as snakes or fish
2. a protruding abdomen
3. the region of the body of a vertebrate between the thorax and the pelvis
4. the hollow inside of something
1. in the belly of the ship
5. a part that bulges deeply
1. the belly of a sail
6. swell out or bulge out