the part of the body in humans between the ribs and the hips, usually the narrowest part of the torso.

the part of a garment covering this part of the body.

blouse ( def. 1 ) .

the part of a one-piece garment covering the body from the neck or shoulders more or less to the waistline, esp. this part of a woman's or child's garment.

a child's undergarment to which other articles of apparel may be attached.

the part of an object, esp. a central or middle part, that resembles or is analogous to the human waist

the waist of a violin.

Nautical . the central part of a ship; that part of the deck between the forecastle and the quarterdeck.

the constricted portion of the abdomen of certain insects, as a wasp.

noun

abdomen , basque , blouse , bodice , corsage , girth , girth (waist measure) , middle , midriff , midsection , shirt , undershirt