The abdomen, especially a fat one.
The stomach.
The womb.
The lower fuselage of an airplane.
The part of anything which resembles the human belly in protuberance or in cavity; the innermost part.
The hollow part of a curved or bent timber, the convex part of which is the back.
To position one’s belly; to move on one’s belly.
To swell and become protuberant; to bulge or billow.
To cause to swell out; to fill.