waistband
/ˈweɪstbænd/
noun
- The strip of fabric at the top of a pair of pants, a skirt, or shorts that fits around the waist.
- His pants were too loose, so he tightened the waistband with a belt.
- The elastic waistband on these sweatpants makes them very comfortable.
- She sewed a new waistband onto the skirt because the old one was frayed.