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.
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.
[Middle English wast, perhaps from Old English *wæst, growth, size; see aug- in the Appendix of Indo-European roots.]
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