n
1 measurement of the body round the waist 腰围的尺寸; 腰肥
*a narrow/slim waistline 纤细的[苗条的]腰身.
2 narrow part of a garment that fits at or just above or below the waist 衣服腰部（或近腰处）狭窄的部分
*a dress with a high waistline 腰部高的连衣裙.

n
[singular]
the amount you measure around the waist, especially used to judge how fat or thin you are
　a trim waistline
[C]
the position of the waist of a piece of clothing