n.1. a. The part of the human trunk between the bottom of the rib cage and the pelvis.
b. The narrow part of the abdomen of an insect.
2. a. The part of a garment that encircles the waist of the body.
b. The upper part of a garment, extending from the shoulders to the waistline, especially the bodice of a dress.
c. Archaic A blouse.
3. The middle section or part of an object, especially when narrower than the rest.
4. Nautical The middle part of the upper deck of a ship between the forecastle and the quarterdeck.