Definitions:

1. A band of material around the waist that strengthens a skirt or trousers. NOUN
   • Her skirt has a wide, fitted waistband for extra support.
2. A strip of material that is either elastic or some other confining fabric that encircles he waist, usually as a component of clothing. NOUN
   • The loose waistband of the sweatpants allowed for a comfortable and relaxed fit.
3. The band of fabric that encircles the waist on a piece of clothing, such as pants, skirts, or underwear. NOUN
   • The elastic waistband made the pants comfortable to wear.

Synonyms:

• belt
• cinture
• girdle
• sash