That part of the human body which extends downward from the
breast to the thighs, and contains the bowels, or intestines; the
abdomen.

The under part of the body of animals, corresponding to the
human belly.

The womb.

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.

The hollow part of a curved or bent timber, the convex part
of which is the back.

To cause to swell out; to fill.