1.That part of the human body which extends downward from the breast to the thighs, and contains the bowels, or intestines; the abdomen. Note: Formerly all the splanchnic or visceral cavities were called bellies; the lower belly being the abdomen; the middle belly, the thorax; and the upper belly, the head.
2.The under part of the body of animals, corresponding to the human belly. "Underneath the belly of their steeds."
3.The womb. (Obs.) "Before I formed thee in the belly I knew thee."
4.The part of anything which resembles the human belly in protuberance or in cavity; the innermost part; as, the belly of a flask, muscle, sail, ship. "Out of the belly of hell cried I."
5.(Arch.) The hollow part of a curved or bent timber, the convex part of which is the back.