Definition of waistline noun from the Oxford Advanced American Dictionary

     

    waistline

     noun
    noun
    NAmE//ˈweɪstlaɪn//
     
     
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  1. 1the amount that a person measures around the waist, used to talk about how fat or thin they are an expanding waistline All this butter and cream won't do much for my waistline.
  2. 2the place on a piece of clothing where your waist is synonym waist
See the Oxford Advanced Learner's Dictionary entry: waistline