waistline
noun [ C ] uk/ˈweɪst.laɪn/ us/ˈweɪst.laɪn/
腰围;腰围线
an imaginary line going round the narrowest part of your waist
a bulging/expanding waistline 日益变粗/逐渐变大的腰围
She started jogging twice a week to try to reduce her waistline. 她开始一周慢跑两次,希望能瘦腰。