The seat of the carnal affections (Titus 1:12; Philippians 3:19; Romans 16:18). The word is used symbolically for the heart (Proverbs 18:8; 20:27; 22:18, marg.). The "belly of hell" signifies the grave or underworld (Jonah 2:2).

Noah Webster's New International Dictionary of the English Language

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

2. (n.) The under part of the body of animals, corresponding to the human belly.

3. (n.) The womb.

4. (n.) 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.

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

6. (v. t.) To cause to swell out; to fill.

7. (v. i.) To swell and become protuberant, like the belly; to bulge.