noun
The abdomen (especially a fat one).
stomach (an organ in animals that stores food in the process of digestion)
(anatomy, countable) uterus (a reproductive organ of therian mammals in which the young are conceived and develop until birth)
The lower fuselage of an airplane.
The part of anything which resembles (either closely or abstractly) the human belly in protuberance or in concavity; often, the fundus (innermost part).
verb
To position one’s belly; to move on one’s belly.
(intransitive) To swell and become protuberant; to bulge or billow.
(transitive) To cause to swell out; to fill.